Hmm, what if Microsoft offered two models of the Xbox One, a home entertainment system model like the one we saw, and a gaming console model, which doesn't have some of the features, like live TV and stuff, but at an extremely competitive price point. That could work well.
They won't do that.
Probably.
I reckon they're sticking with just one model, to avoid any sort of confusion, since the device is "all in one".
Integral 500GB HDD seems to be indicating that too, i think.