5"x8" doesn't fit in my pocket. I have a paper notebook here on my desk that is 5"x8". I never use it. I have a moleskine  that goes with me everywhere. It's harder to write in the moleskine than the larger notebook, but then I don't ever have the larger notebook with me, so it doesn't matter.<p>If you're making me give up ergonomic input by giving up the desktop, I need to gain portability. That's why netbooks sucked so hard, input sucked and they weren't more portable than my laptop. The on screen and slideout keyboards on the iPhone and Droid are awful, but at least the devices fit in your pocket.<p>And can we please get over the techy self importance? The iPhone is pretty popular -- amongst geeks and rich people. Most people who have cellphones in general still have the freebie brick or folder that came with their plan. Just because Apple has done something to make a big splash in our pond called the tech industry doesn't mean our pond is large enough to matter to The World.<p>According to this site (<a href="http://www.wirefly.org/news/cell-phone-facts.php" rel="nofollow">http://www.wirefly.org/news/cell-phone-facts.php</a>), 72% of the US population owns cell phones. I don't know exactly what they mean by that, but if that's 72% of the approximate 300 million population of the US, then that's 216 million cellphone users in the country. According to Wikipedia, Apple has sold 42 million iPhone units (<a href="http://en.wikipedia.org/wiki/IPhone" rel="nofollow">http://en.wikipedia.org/wiki/IPhone</a>). That's roughly 20% if you aren't accounting for people who have paid for upgrades to the 3G and 3GS models. This page indicates that 16% of the market owns PDAs in general, lumping the iPhone into the PDA category (<a href="http://ticketsdotcom.blogspot.com/2009/09/mobile-trends-americans-cell-phone.html" rel="nofollow">http://ticketsdotcom.blogspot.com/2009/09/mobile-trends-amer...</a>). Significant for sure, but not "taking over the world". Why should we expect a device of <i>less</i> utility than a cellphone to do better?