Even as someone who's used Android tablets since their earliest incarnations, I've found the new 10-in. tablet UI easy to use and adapt to. It feels completely natural to move from an Android phone to a 7-in. tablet to a 10-in. device -- and that platform-wide consistency is very much Google's goal with this UI change. From a perspective of platform growth and accessibility, that makes perfect sense.
The one area where I'm not completely sold is on the placement of the virtual navigation buttons. Those are buttons you frequently access while using a device -- and when holding a 10-in. tablet in landscape mode with two hands, their centered orientation makes them rather difficult to reach. I get why they're centered from a conceptual standpoint, but it'd sure be nice if there were a way for the user to reposition them to the left or right side of the screen for more ergonomic access.
Interface aside, Android 4.2 now supports multiple user accounts on tablets. Google says the feature will let each user maintain separate home screen setups and app collections as well as access to his own Google-related services like email and storage.
Multiuser support was not yet available on the prerelease software on my review device, so I wasn't able to test it. Google says it'll be added via an over-the-air update on the day the tablet launches; I'll revisit it in my blog once I've had the chance to check it out.
Android 4.2 introduces a slew of other new features, such as a redesigned Camera app, a new system keyboard with slide-to-type support and a powerful multilayered security system. There are also some improvements to the Gmail app and signs of subtle polish sprinkled throughout the UI.
I went into great detail about the various new features in my Nexus 4 review earlier this week. Rather than repeating myself here, I'll point you there for additional information.
What about the apps?
Before I wrap up, there's one elephant in the room that needs to be addressed: the apps. Android is frequently criticized for the lack of apps that are optimized for the tablet form, particularly in comparison to Apple's iOS platform.