Grand Design in the Reflection line comes stock with a booth in it. We ordered ours with the dinette. I think most dealers order the dinette in place of booth.
I have had rear entertainment centers and would never have another and I'm not joking and I have had 2 of them (didn't learn the first time. There is no place in it that has a comfortable viewing position. Also you lose the big window across the back and sometimes it has a great view out it. Everybody has to crane their necks to watch TV. I think manufacturers finally got smart and put the TV on the side with some of the seating straight across from it. Also if the TV is in the rear and you have 2 slides in the rear on the unit you won't be able to see the TV if you want to spend a quick night like in a Walmart with slides in. We can use our unit in with the slides in except cooking but for quick stops we usually have something cold in the fridge for diner or run into Walmart to their deli and get something. We can sit in our theater seats and still watch TV straight across from us and if I fire up the generator I can even use the fireplace, try that in a trailer that has slides that close off the TV and if you have a fireplace. The slides are in most cases not going to allow you to use the fireplace.
The reason in most cases you aren't seeing them is because most people don't want that layout.
This IMO