Something that you might want to consider is that many PC vendors are refreshing their hardware lineup and have some very cool machines in the pipeline, designed for Windows 7. Dell has a laptop that's actually thinner than the Macbook Air, but physically larger (larger keyboard and screen). Sony has a thin netbook-like PC that's so thin it will actually fit inside of a Macbook Air.

And there will be a wide selection of all-in-one PC's, like the iMac, designed for Windows 7, that have multitouch support which supports some really cool apps. I have an HP TX2 tablet, which supports multitouch, running Windows 7 with a multitouch version of Microsoft Virtual Earth that allows you to use gestures to flick the map around, zoom in/out, etc. Once other ISV's start jumping on the multitouch bandwagon I think we'll see some really cool innovation in this arena.