Wow, getting live updates from the battlefield is very, very cool. The idea that you can sent orders using the app actually makes it useful when playing the game also, I can see this being a useful tool for commanders etc to have by them. Could turn out to be a really cool feature within the game, as well as simply stat tracking (with a lot of depth by the looks of it!)
I used the Battlelog app a fair bit with BF3 as I found it quite useful to see what achievements to get or what gun to unlock next while waiting around / chilling with my phone. Definitely glad SOE are taking that to the next level!