Also, consider really thinking for a moment, do you want to sit perched on the edge of your couch with a gamepad staring down at a coffee table or would you rather just sit back and play the game on the TV set?
Couch plus arcade generally doesn't mix. If you are sitting properly on the couch then you can't reach the controls and probably don't have a good angle on the screen.
Mate, I do hear your rationale but I guess it's horses for courses. It's about making the cabinet fit the room. I have a stand alone garage conversion games room. Its pimped out with paneled walls, insulation, timber veneer trim, timber drinks ledge on one wall, coin operated wood pub style pool table. Walk up bar etc. The room is class, I realise this might be heresy but a standup cabinet or bar top would look tacky in there.
My mate is a cabinet maker and I'm going to get him to make a classy coffee table to hold it all. The room has a couple of leather couches and needs a coffee table. It will look like a normal coffee table that can turn into an arcade unit. Using black glass and fold out arcade controls.
For all that, I will only probably play it when mates are around and we can put up with a little hunched gameplay.