Which is why I think they should cut out the BR - it's a whole-house DVR first and foremost, with some apps thrown in to make it more of a 'one box' solution. But most enthusiasts already have BR wherever they want it, and the Q will likely be too expensive to buy for more than one set.
Have it play BR rips from network servers, sure, but there's no need for a drive unless they can source them for dirt cheap (less than $20).
If this box comes in higher than $750, it will be a tough sell outside of a small niche of enthusiasts. And it's still not a guaranteed win at that price. I've seen reports that Digeo/Arris sold less than 5000 units of their Moxi whole-home DVR, for example, which was priced roughly at this level (but only 3 tuner).