I don't see how buying a larger monitor would support the same thing at all, you're just taking the same FOV and extending it over a larger space. A typical monitor is 16:9, this is effectively 48:9.
They don't make really big 48:9 monitors.
All in all, I'm too poor for lots of big pretty monitors, and I always play on one monitor anyways so I can keep things like vent/skype/the internet visible on the other since I'm really ADD and can't focus on a single thing for more than 15 seconds at a time. (At level 60 in WoW I used to alt-tab and read forums during Gluth's fear in Naxx. Yes, the 6 seconds of fear took too long to hold my attention, so I alt-tabbed to read stuff during that time. And still got #2 DPS SUCK IT BITCHES I'M FUCKING AWESOME.)
I think we're all missing the biggest issue here, can you image these three pictures, all displayed side by side, all in glorious high-def? I can't, because I think I'd instantly explode in my pants.

ATI Eyefinity, Multi-display setups, and Global Agenda

ATI Eyefinity, Multi-display setups, and Global Agenda

ATI Eyefinity, Multi-display setups, and Global Agenda