I don't see the appeal in phone gaming, especially phones that only have touchscreens.
XBLA integration is a useless feature for me personally.
Entertainment on the go + the fact you get to carry less devices seems like a good case for phone gaming to me.
Phone gaming has been around since phones had screens that displayed more than just numbers (remember Snake -- first game preinstalled on a mobile phone)? and it's just until recently that it's becoming more and more popular.
I don't see the appeal in phone gaming, especially phones that only have touchscreens.
XBLA integration is a useless feature for me personally.