The Droid X is 4.3" same as the EVO and several other larger phones on the market today, including some WP7 phones. I think that is the largest you can easily fit in your pocket that the mass market would accept. I don't think I would really even consider a 4.3" phone as it is just too big for my taste. Though to me the iPad argument you make, if I understand it correctly, is wrong. When I buy/use my iPad I did so because I knew I would be getting a very different experience between the 3" screen of my iPhone and the 10" screen of the iPad. I think it is a lot harder for the Android makers or even Blackberry to push a 7" screen to compliment a 3-4.3" screen.