I’ve seen other arguments saying that Xbox8 and infinity will just refer to the Xbox dashboard and not the console (maybe they are implementing Windows 8 into the dashboard?! How much would that suck!). The speculation also continues with saying Bungie’s new title Destiny will require always online. That Infinity might be referring to the always online bit…
Who knows, this is all speculation. We have less than a month now until the Xbox reveal on May 21st where we will get some real concrete answers.