I have my 65 inch Eclipse mounted on my wall using the motorized mount, and it's perfect for my use. I've (well, the installers did this) run the HDMI cables through the wall into my office (my office is behind the wall where the TV is mounted) where I have my cable box, router, etc. I have a PL coming out of the wall below to drive my BL2 (which I don't use nearly as much as I thought I would because for much of our viewing, the sub is overkill). It's a very clean install. No visible cables. The BeoRemote controls everything. I think the TV looks almost like it is floating when it swings out from the wall. Still makes me smile 4 years on.
For me, the lack of flexibility wasn't an issue because the TV really only works in this location. Yeah, I doubt if I can take it with me when I move, but moving is not in my near or long term plans so I bit the bullet and did it right.
The only "issue" I have is that I have no good location to place external speakers. If you keep the front speakers against the wall on which the TV is mounted, then when the TV swings out, one of them will be partially blocked by the screen. The room layout has more to do with this than the Eclipse, but none the less, it sometimes bothers me that I'm not using all the WISA surround sound goodness the TV is capable of.