joytech22 :
They need a 50+" version of this.
I would buy one immediately assuming that one that size was at least 4K resolution (or whatever 4K is to this ratio)
My REASON for wanting a 50+" version is for a home-made cinema (that isn't using a projector).
I could use one of these monitors for my video editing actually. I hate zooming in and out of tracks to get to the end so I can add a song in etc..
Just a heads up (hopefully a useful one and not saying that you didn't already know), a screen with this aspect ratio would be 46" wide and 19.4" tall, by my (rounded off) calculations.

(Just in case, I'm not criticizing your taste and it sounds nice.) I also heard that the wider the monitor gets, the less screen area it has for a specific diagonal measurement. A 50" screen of this AR would have a screen area of 895.34sq.in. while a 16:9 for example would have 1,068.25sq.in.
A Bad Day :
Eventually the monitors would need to be slightly curved if they keep getting bigger, otherwise anything on the edges of such monitors would appear warped.
I believe Alienware did something like that in the past, as was referred to by some people above.
bnot :
It's basically a 4:3 dual screen setup, but in one unit so you don't have the edge of the monitors running through the centre of your desktop.
I presume it's designed to be an alternative to having dual 1280x1024 monitors.
It's aspect ratio (2560x1080 or 2.37:1) is closer to two landscaped 5:4 monitors (1280x1024, like you said) which have an aspect ratio of 10:4 or 2.5:1 rather than two landscaped 4:3 monitors which have an AR of 8:3 or 2.67:1. Just felt like pointing that out and I mean no insult.
chewbie :
i doubt we'll see this ratio on laptops. Maybe tablets
Actually...
Hands-on with Toshiba's Ultrawide 21:9 14-inch Ultrabook Hehe...
Now, when I saw this, what came to my mind pretty much at once was
portrait Eyefinity setups (just something fun to think about)!
😀 To come up with the aspect ratios, I'll use the aspect ratio of 2560x1080 since it isn't really exactly 21:9.
3x1 portrait of these would =
3240x2560 which has an AR of
1.265625:1 which is pretty much...OMG! a 5:4 (1.25:1) screen! :lol: Imagine a 5:4 screen with that much resolution. (For all I know there may have been already.)
5x1 portrait of these would =
5400x2560 which has an AR of
2.109375:1 which is almost...itself except with 5 times the resolution. :lol:
Well, bezel compensation (added resolution) may be considered as well...
But anyway, just some trivial facts and figures I came up with. Hehe... (Yes, I know. I'm weird.
😛)