I 'm planning on using it as a movie watcher during comute and programming terminal otherwise (otherwise dicking with the stylus because a syntic wasn't really an option right now...).
I can use it for web browsing too but I got a functional mbp and wiiu for that so I'm not forced to use it that way...
I can still plug in normal mouse and keyboards after all while waiting for the power cover....
Note there is only one USB port - you will either need a hub, or a Bluetooth Mouse/KB.
Personally, if you think 5-7.5 hours is okay, get a type keyboard. Else, power cover it is in 2014, as apparently this will raise the battery life to the 8-13 hour levels.