I picked up the LG 32UM95 today at Microcenter for $999 before tax.
It's a nice monitor and I fell in love with it when the sales rep showed me the old Mac Mini driving the display at 3440x1440. Well, I bought it and a thunderbolt cable (LG is too cheap to include either the thunderbolt cable or the USB uplink cable). The monitor is pretty good, but my unit seems to suffer from back light bleed on the left half of the screen. It's very noticeable on dark scenes. Also, there are some quirks with the thunderbolt linkup. For example, when the monitor changes display resolutions, it disconnects all the downstream thunderbolt devices and then sort of restarts itself and takes the new resolution.
The split screen is nice and everything, but you'll need to force a custom resolution on your computer to not have a blurred image.
My 2012 Macbook Pro with the retina screen is able to drive the 32UM95 at 3440x1440 and a Samsung screen at 2560x1440. I can hook up a third screen, but I'll have to use the HDMI connection.
I have a late 2012 mac mini, I have not even hooked it to the UM95, I did not think it could drive it at 3440x1440. I also have a 2012 MackBook Pro Retina, it drives the monitor at 3440x1440.....looks pretty good. Now that I know that the mini will do this as well, I have to find a way to daisy chain all this stuff via thunderbolt.
In addition to the 2 macs, I also have a Thunderbolt Display. I assume I can daisy chain this in such a way that the mac mini and the macbook show on both the TBD and the UM95 (not at the same time of course) via thunderbolt, without the use of a thunderbolt dock. Is this doable?