Last week at CES, we saw plenty of upcoming consumer electronics products that will be launched sometime this year. Unlike last year where tablets were front and center at the tradeshow, Ultrabooks have taken over the limelight.

Given how it played out last year, this isn't surprising. Most manufacturers launched a typical 10-inch tablet last year and none of them came remotely close to competing with the Apple iPad.

Perhaps it's a sign that more innovation is required. However, the models we saw at CES gave us reasons to be optimistic, as there were definitely more varied designs. The tablet form factor, or even how we define it, appears quite malleable at this moment and we expect it to evolve further. Here's what you can expect this year.

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Higher-resolution displays

One of the more persistent rumors about the next version of Apple's popular iPad tablet is that it will have a panel with a significantly higher screen resolution. In other words, a screen with a pixel density similar to that on the iPhone 4's Retina Display. As rumors go, this one seems very possible.

After all, Apple's competitors are already preparing tablets with high-definition displays. Asus showed off the TF700T, a beefed-up version of its Transformer Prime with a 1,920 x 1,200-pixel screen. It also comes with a more capable 2-megapixel (from 1.2-megapixel) front camera that supports HD video chat.

Acer also teased a new tablet with full-HD 1080p resolution. The Iconia Tab A700 is likely to be powered by the quad-core Tegra 3 processor and, like most new slates announced so far, will use Android 4.0 Ice Cream Sandwich.

More hybrid designs

As we mentioned earlier, we saw more variety in tablet designs at CES. From the versatile Lenovo IdeaPad Yoga, that is both a tablet and an ultrathin laptop, to Razer's gaming handheld, Project Fiona, the form factor is going places this year. And it includes going underwater.

Fujitsu showed off its Arrows Android tablet, which is waterproof up to 1.5m. The 8-inch Pantech Element tablet may only run Android 2.3, but it has support for AT&T's LTE network (4G) and it is also waterproof. And still on the rugged front, Panasonic also took the opportunity at CES to demonstrate its military-grade ToughPads. While the company announced these products last year, they will go on sale this year.

Meanwhile, Lenovo also introduced a tablet featuring a removable keyboard, just like the Asus Transformer. The IdeaTab S2 is a 10-inch slate with a snap-on keyboard that converts it into a laptop-like device.

As for Asus, we're still hoping that the Padfone it featured at last year's Computex will finally get a launch date. The device was shown at CES, though we heard that there will be more details about it at next month's Mobile World Congress. At the moment, this smartphone and tablet hybrid appears to be using Android 4.0.

Besides these models, which are mostly final products, CES was the venue to show off concept devices that may (or may not) make it in some form to the market. Razor's Project Fiona, a Windows 8-based gaming tablet with physical game controls, may have been very popular with the audience, but we were also intrigued by the Wikipad. This 8-inch Android 4.0 tablet has a detachable gamepad, 3D support and a 1080p display. Its US$300 price tag is also very attractive, if the company can pull it off.

We also saw forward-looking tablet designs from the likes of Sony and Toshiba. Suffice to say, we are unlikely to see them this year, but it does bode well for this segment.

Greater range in prices

This may seem obvious now, but before the advent of Amazon's Kindle Fire, most tablets from a major vendor cost around the same as the iPad. Asus' original Transformer was considered a good deal at US$399. But the rush for the HP TouchPadafter its massive price cut and of course, the US$199 price set by the Kindle Fire has changed things.

This downward slide is set to continue in 2012. We saw some affordable tablets at CES, such as the Viewsonic E70 ViewPad that costs US$170 with Ice Cream Sandwich. But the biggest headline went to Asus, which boasted a 7-inch tablet powered by Nvidia's quad-core Tegra 3 processor, at just US$249. While the announcement was predictably light on details, the fact that Asus is contemplating such a low price point for seemingly state-of-the-art hardware is like a thrown gauntlet to other manufacturers.

Besides, if the rumors are to be believed, there will either be a lower-end and cheaper version of the iPad 3 this year, or a discount on the iPad 2 by Apple to compete with the Kindle Fire.

What not to expect--better battery life

No doubt, the focus at a tradeshow like CES is the upcoming products. Hence, you are unlikely to find developments in battery technology. Yet, with new tablets expected to add support for 4G in the near future, the battery life for these devices may take a slight hit, even if they are equipped with quad-core processors that are touted to be more energy efficient.

Higher-resolution displays, too, will take its toll on battery life. Manufacturers are also constrained by the ever-slimmer form factors. These factors, together with the typically slow improvements in battery technology, mean that barring a technological breakthrough, we do not expect tablets to have significantly longer uptime than current models.

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