The one computer to rule them all
I saw a blurb in this month's Technology Review magazine about the Padfone: a cellphone that slips inside a Pad device when you want a larger screen. Good idea as far as it goes but why not add instant connectivity to any compatible keyboard, monitor, and trackpad in the area.
I find a slight hassle switching between my MacBook Air Air, iPad, and Droid during the day. Having one tiny device with a copy of everything is a possible alternative to Apple's iCloud, Dropbox, and other distributed "store all of my stuff" ideas.