Considering the revealed spec is well above the competition's, I don't know why they would keep raising it. They could be weighing out the fact that a few extra bumps up wouldn't cost them that much more, if any. Still, I really don't see why the specs would end up being significantly greater than what they have already revealed, though.... unless the specs were all a front in the first place. I highly doubt it though. Now is where they need to hit a reasonable price point in order to make a viable consumer product.
It doesn't have to be cheap, per say. It really has to be a value, though. Whether it's as cheap as $450 or as expensive as $600, it has to really deliver for it's price.