I'm quite excited about this given the vision Canonical had with their failed crowd source attempt. A desktop replacement you carry around in your pocket. This is going to be tempting to anyone looking for average computation power in a small form factor. If it's seemless it could be a real game changer. It'd have to allow for a multitude of different setups (bluetooth keyboard / mice, wireless monitor connectors as well as HDMi (mini HDMI) etc etc...
What a nightmare, but if done right could mean some major pressure for BT Retail / Business.
What a nightmare for B Sky B:
Implementation.Interoperability.
Consolidation
Support
Sky lock down their routers. TalkTalk let you use your own.
Why it could be good for B Sky B:
Increased network capacity
New subscriber up sell potential.
Traffic management experience
Parental controls
IPv4 allocation
Static IP's
IPTV experience (Tiscali TV was a true implementation).