Maybe that's because most people PCs already stream anything they want round the house. Not really sure being able to record something on TV and then stream it is that big of a deal to be honest. I've already got a Tivo.
As I understand it, Durango/STB is a hell of a lot more than Tivo...
- in theory it should be able to stream the TV to your tablet, whilst you play a game on the TV.
- a popup window or a twitter feed or whatever that appears on your TV, but appears identically in your 1080p AAA game.
- "play a game whilst the console record's the TV you were watching".
- in your 1080p60 game, you get a popup with your tv programme to warn you that it's starting.
- you press install and then select 'tv', the system tells you when it's installed.
- you recieve an email and a warning pops up on the tv 'newemail' - you can select it and the live tv records then resumes afterwards.
- it connects to your PC and informs you when something happens to it.
- skype pops up overlayed, recieving the call pauses the TV (or the game).
- it connects to your phone.
[etc]
(the original leaked design brief covers a bunch of use cases - and, I guess, there's no requirement for only 1 HDMI in, or only 1 HDMI out?)
Having said all of that, and despite being intrigued... I am concerned that tablets might make this 'less relevant' in 2013 than it seemed a few years ago. Also the interface is likely metro, which hasn't been all that popular.