Why would you buy a PC from HP?
Great question. Even if you format the drive and load a clean copy of Windows, you still can't get the HP crapware out of the firmware. You know, the one that blocks you from putting any wireless card you want in a laptop... The truly evil part is that they RSA sign the firmware so you can't modify the hardware whitelist away. Seriously, stay away from HP.
So they're letting design decisions for their phone interface dictate how they implement their desktop interface.
You mean Ubuntu is about to adopt Metro?