Looks like a wise solution to the problem, if the screen size is suitable. I guess if I were inclined to play my old consoles at a desk it would be great, but I'm too old to get my head, or ass, into that idea. I spend enough time at the computer desk already. But I am going to have to deal with this issue. My old 36" JVC CRT-TV is on the fritz. Been looking at best methods of displaying retro consoles on modern HDTV's, and it all just sucks. Basically looks like you're wasting your time and money unless you go with the XRGB mini, which is over $300. Then you still need RGB SCART cables for the consoles that can output it, or else use the XRGB mini's S-video and AV inputs, which seems like an awful lot of overkill. Or, modify the console to output RGB, or for some consoles there are now direct HDMI-out mods. To be honest, I'm not too excited about modding my old consoles even if it's done right.
Maybe you're on the right track with this. Or else maybe I get lucky and find an old trinitron in good shape.