I have the same problem. Have a 47 inch set at the minute could go to 50 but 55 just wont fit in the corner without a major room rebuild project.
I believe a lot of people must be in a similar boat and I would love either an OLED set or a Quantum dot set when they come out.
To be honest even if I could just fit it in the wife would never accept it as I had enough trouble when I moved from 42 inch to 47 inch and again I believe many (probably more than many) people are in this particular boat.