I was shocked at the price for the gear, just dont quite understand that. Make a base model just to allow download and playback of these full AQ/PQ files and throw a 2TB drive in it. If you make it expandable, no big deal. Someone like me who watches most stuff once, is all about convenience.
Personally, I don't mind opening the box and pulling out the disk. There is something special about the physical media: being able to hold it in your hands, showcase it on the shelf, browse the enclosed booklets, etc. If the price is similar, I would definitely prefer the physical media.
Sony's $699 player will make a lot of sense for Ultra HD though, since no physical media is available yet.