The Post-PC CEO: No Desk, No Desktop - WSJ. Look at the comments. I find it funny that as soon as you attach a keyboard to a tablet, it ceases being a tablet in the eyes of many people.
The other day Lollipop (Android 5.0) was pushed to my 2012 Nexus 7. At that time I decided to do a full reset to get a clean experience. So far I like Lollipop and very much look forward to installing it on my other Android devices, but it seems to push the limits of this old Nexus 7. For example, when I tried Guest mode, the tablet essentially locked up and I had to restart it to get it to function again.
I've noticed that running Facebook seems to also cause stutters when scrolling and switching between apps. It looks to me like this Nexus 7 simply does not have enough RAM to run the latest versions of Android comfortably, and it makes me wonder why Google even makes it available.
Android Central has a great tip for enabling a number key row on the stock Lollipop on-screen keyboard.