No point, more expensive and don't really care for the huge thick black line splitting the images up. It's a cool novelty, I'll give you that, but a waste.
I'm not talking about using both monitors for gaming (displaying the game across both monitors), I'm just thinking about everything else you do on the computer. Having two monitors is like going from dial up to broadband (well maybe not quite, but it's a huge improvement anyway)
I've gotten so used to having two monitors that I feel almost handicapped using a computer with just one monitor.