All of them had fan support and all of them failed in the marketplace (and the "open source" Phantom never even made it to market).
There's less vendor lockin with consoles now. Fewer titles are platform exclusive. Online services are much important than they used to be (notice there's little to no mention of this in the promo video). The question becomes bigger than, "How does this console compete with the Xbox?" (which is already a HUGE question), it becomes "How doe this console compete with Xbox Live?".
This product is going to be openly competing with big, established players with lots of cash and decades of experience. And it's not just the big 3 console makers. They're competing with SmartPhones and iPad gaming too, basically any electronic gaming experience you can having sitting on the couch in your living room.
Fans of hackable linux boxen and hardcore gamers are always super enthusiastic, but I don't think that demo is large enough to help a company succeed in the way this company needs to succeed.