Here's a little warning about super-wide displays (speaking from experience)
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I have the matrox tripple-head-2-go.
You achieve basically the same thing as that alienware display :3x wide single display (made up of 3 linked separate displays, in my case).
Unfortunately, what manufacturers don't bother telling you is that most games have a fixed horizontal field of view angle.
For example, using a given game with a 90 degree horizontal field of view :
@ 5:4
If your display is 25" wide and 20" tall :
90 degrees of view in X
72 degrees of view in Y
@ 15:4 (tripple wide)
If your display is 75" wide and 20" all :
90 degrees of view in X (fixed horizontal FOV)
24 degrees of view in Y
So, with the tripple-wide, you're effectively blinded up/down.
(Because your up/down field of view is so small)
I was pretty disappointed...
*MOST* games had fixed horizontal FOVs.
The only game I had that actually had a fixed *vertical* FOV instead of horizontal, was CS:S.
All ID engine games let me adjust the horizontal FOV in the console.
WoW doesn't let you adjust the FOV's.
Though, you can zoom out in the config.wtf file, which helps somewhat.
I actually bought the TH2GO for WoW, and found out all the adds were misleading.
How the adds were made :
(Note : I got the matrox folks to admit this on their forum.)
The camera would zoom out, and take a screenshot.
Then they would crop off the sides, and use that remainder as the 'normal' screenshot. So it looked like you gained FOV using the TH2GO. But you really got vertically blinded

.
Le'sigh.
What does this matter?
Well, a super wide screen like that will suffer the same thing.
You'll be vertically blinded.
And it's not a matter of "wide screen support".
"Wide screen support" only means that you will be able to select your resolution.
The issue is whether or not the game lets you peg your field of view to the Numerator or the Denominator in your aspect ratio. That is a developer choice/prerogative. Usually this is not an issue. It only becomes an issue when you're dealing with extreme cases, like a tripple-wide display.
Newer games will probably have this addressed to some extent. Just don't expect anything you already have now to give you a good ultra-wide experience.
-scheherazade