@Tripitaka
Maybe. Certainly you could use intent as the OS and run MHP on that, but that doesn't help AA, and nobody is likely to broadcast AA apps when MHP is tailored for TV and will work for more people.
Having said that, YooMedia are planning something similar for the UK, where they "data broadcast" services for running at a later date (a web search for YooMedia and Electra should pick it up), and you need a box running the Electra software. So maybe it's not so far-fetched as I first thought.
Chris