From my post on aiaio:
Contemplating how to service users with 1.5″ BlackBerry screens was one thing; dealing with iPad users, with their 1024×768 screens and just-like-a-laptop-only-better expectations, is entirely another. And while the iPad may be just a first step in an evolution, a million unit sales in a month suggests someone found the keys to the steamroller.
It’s easy to forget that the iPad is both a laptop and a mobile device–a blurry line that is only going to get blurrier. I know of a retailer that converted a few thousand dollars in sales on its circa-2007, Flash-enabled website last year … in iPod Touch user sessions. Evolution doesn’t wait.
I think in the next years the touch screen will be the only input method for computers because it is easier to work with a touch screen and the range of opportunities for this is big.