Isn't something that wide going to make your games look like crap if it does work at all? Except for a tiny few games for the Amiga, they are all 320x200 for NTSC games and 320x256 for PAL versions. I would imagine that they would look so pixelated on a huge LCD. Maybe if it is also a TV with composite input and does the scaling for you, but I don't know about your idea.
Send a picture if you find one and it scales the display well for those games of yours, I would like to see it.
I have a very old 27" diagonal Sony TV that may get turned into a display for my CD32 w/SX32 Pro, an old VCR for VHS tapes, my Sons PS2 and old XBox (if I can fix it). That will give me a good excuse to buy a 50" or larger wide screen TV when the mandatory HDTV goes into effect next February.