That is only true if your 2.35 or 16:9 screen is small to begin with, I hardly ever watch 4:3 material in my HT room, but when I do, it is not that small. Here is my setup:
2.35 movies 51" x 120" or 130" diag.
1.85 movies 51" x 94" or 107" diag.
1.78 HD 16:9 51" x 91" or 104" diag.
1.33 4:3 Std 51" x 68" or 85" diag.
So in the remote chance I would watch 4:3 material, which is unlikely for the purpose of having a big screen setup, 85" is NOT SMALL.