It didn't do anything useful because it was a prototype, nobody really got the time to build great apps for it, and it didn't get rejected for anything except:

It didn't do anything useful because it was a prototype, nobody really got the time to build great apps for it, and it didn't get rejected for anything except: it was bulky (can be solved) and it has a camera on it so privacy implications (ie naive hoomans/public who don't realise this is inevitable/how much they are already being recorded in public).