Our systems install via PXE boot whenever possible. Much faster than DVD/CD, floppies and alike. I have been fighting with PXELINUX (part of the excellent SYSLINUX package of boot loaders with menus) trying to get it working the way I want it to. This is important for JackRabbit and our compute clusters.
Surface computing. I can see uses for this, in HPC and analytics, not to mention tele/remote medicine, science/engineering … Kudos to Microsoft. This should be quite cool.