That device does look pretty interesting.
Here's a "preview" of it at FiringSquad if you're interested. There are a few things that are an issue with the device though:
1. It's VGA based (no HDMI or DVI connectors need apply). This isn't good for HDCP-protected content if you plan to invest in a next-gen optical drive. If you're the type of person to spend $300 on a device to enhance your video display system in additon to having a separate Video Card (not to mention the requisite 3 monitors)...
2. Resolution. It's limited to a maximum of 1280x1024 * 3. That's not a terrible resolution, but it certainly wouldn't look good on
any big LCD displays, and it's lower than I like to run games.
3. The last thing that scares me is that it seems that it needs specific support built for individual games. While the support list now is extensive and covers most current relevant games, it is short on the support for older games (and who knows what the future holds once the device is replaced by the v2 of the product). It does seem that somehow it will let you build your own profiles and share them, but it remains to be seen how that works and how flexible it is. There's also some mention on the preview article of GPU support. It worries me that future video cards could be an issue with the device.
Still the device looks pretty interesting. If I could afford to ditch my 2 21" Mitsubishi CRT's on my main Computer and pick up 3 nice LCDs I would probably strongly consider this option. The possibility of running Half Life 2 at 3840x1024 is pretty appealing. And, the fact that you don't have to resort to any driver-level trickery to manage your desktop
as one monitor has some distinct advantages. I use dual displays on all of my primary machines at work and home, and once you start using it, you never want to go back. I think my main concern with this device is the resolution issue. For it to be really exciting, I think it would need to support at least 1600x1200 * 3 (and preferably 2560x1600 * 3 for those 30 inchers).
Now I'm dreaming of getting two of these things, running one of them on each output of my X1900XT with 6 Dell 24" UltraSharp displays. Mmmm...