In this Engadget.com post, Ross Rubin makes a case for using (a form of) Windows on Tablet PCs.

For those not on the cluetrain, it’s the apps!

From the post,

Apps close the gap. It was clear from the iPad 2 launch that Apple is not shying away from throwing processor-intensive apps such as GarageBand and iMovie – two of the most processor-intensive products from the Mac's iLife suite – at the iPad. If tablets are really migrating from being primarily content consumption devices to content creation devices, then Microsoft can make a strong case for an OS with more mature capabilities to facilitate this next generation of apps. Apple's addition of video-out mirroring capabilities also shows that we may be demanding more of tablets in terms of the interconnects that Windows already supports.

Read more here