Interesting but not really special.
You have to give them credit.
This device is just an I/O hub. Think back to a terminal server. (Ok if you're not that old....) A terminal server connected a bunch of dumb ttys via serial cable and then had a single cable back to the server where it was then demuxed to a bunch of serial ports.
Jump forward, you have a virtualized server, and this device wraps tcp/ip around the KVM&Sound data to each device.
So you virtualize your server, had decent network bandwidth and you can now virtualize the pc to be this box, a monitor, keyboard and mouse. (speakers too)
It will work, but you're at the mercy of your network, not to mention that this little thing can only do 10/100 MBits. Not good for a gamer, assuming that the virtualized PC is good.
What it could be useful for is an internet cafe, kiosk, or remote pcs in high traffic areas.
Want to bet they do a partnership with IBM that puts virtualized servers in the cloud? So you can centralized your PC virtualized desktops, then put an el cheapo device at a desk . You can have a virtualized office where no matter what desk you sit at, when you log in, you have access to all of your work.
There is a market, but now you've just lost your cube and you're now in a work farm.