in short it depends what you mean by affordable. my own one cost me £672. crazy but hell i was in the mood.
if you get one like mine, a dell 24" then yes they can display other res's but either stretched across the screen which some people don't ind others do, you can stretch it while maintaining aspect ratio which leaves black borders or you can do what i usually do and use 1:1 pixel ratio which does not use interpolation or blending or pixels but can leave black borders around the image if the res is too low.
It looks like they have quite a few drawbacks, however, the ability to play your games in an immersive cinematic experience is quite tempting. It looks amazing just from screenshot comparisions. In a FPS, which I plan on playing lots of, a wider screen could give you quite an edge in combat.
My main concerns are response times and dead pixels.
dead pixels on a screen this size would be very hard to notice. if you ahd a big cluster then maybe but you could return it if it had them.
too much IMO is made of response times. unless you are hyper sensitive to ghosting then you won't notice any. tbh i always think it is an old problem found on early LCD's but i suppose some are better than others.
my monitor has a 16ms black to black advertised response times which is more likely in the 20's and i don't notice any.
IMO, although not always easy to do i advise actually seeing the monitor your wanting to buy in person and getting a feel for it.
I second that on response times. I've been using a Samsung 213T-21.3" LCD for a while now, it's not a widescreen though. Samsung's specs indicate a response time of 25ms, which according to "some people" is just unheard of to try and play a game on. But I have to say, even if the 25ms is accurate I've played q3 online, q4 (single and multi), d3, HL1, HL2+ep1 and I've never had a problem with the monitor not performing in situations.
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