I never even considered those wall TV stands! Tha is an awsome idea! You would need to check weight allowance, though TVs are pretty heavy, so they will probably be strong enough. And fix some way to make sure it doesn't swivle when you have everything already set up. Don't want the tank swinging around!
This is about the only way I can fit more tanks in here. I have so much unused space up near the ceiling...wow, what an idea! I wonder how much those things csot and where one can buy 5 or 6 of them.
My hubby won't let me put any tanks in the bedroom. I only barely have enough room in the kitchen to fix dinner, with the tanks on the counters in there. (I usually prepare dinner on the deep freeze, since I can't have tanks there because the door opens up the top. Don't think I didn't consider it, though..."just something small I could move when I needed to get into the freezer...")
I have 2 ponds on the deck out back. There is room for more, but I have been concetrating on getting indoor tanks. Plus, I wiull have to bring those animals inside in a couple of months. Next summer I will see about getting more outside tanks. I have 8 tanks in the kitchen and no more room. 3 tanks on my computer desk and no more room...actually, now that I look, a 2.5 gallon would fit in front of my new LCD monitor...hmm, better not even go there, hubby would not approve.

5 tanks along one living room wall, 4 along the other, and 1 beautiful brand new 125g along the wall by the front door. I got a tank in my daughter's room by telling her it is "hers" (yeah, right) And I do still have a betta in the bedroom, because the hubby said it was the sound of filters and pumps while he was trying to sleep that annoyed him.