Let the hive mind of Engadget get that for you.
"I finally got a new laptop with a lone USB 3.0 port. I'm now looking at getting a USB 3.0 hub with a power adapter so I can use both of my USB 3.0 hard drives at faster speeds. I've read lots of horror stories where some hubs either don't come with power adapters -- and as a consequence the portable drives don't work with them properly -- or they are designed poorly which results in USB 2.0 speeds. Or, the hard drives keep getting disconnected. Do your readers have any suggestions or experience using USB 3.0 hubs? Thanks!"
Well, nobody else has pointed it out; the 960x480 cannot reasonably be combined, because it's roughly a 2:1 aspect ratio; while each of the screens _is_ about 2:1, combined they'd be 1:1 or so. So barring some seriously rectangular pixels, or mad slice/dicing, you don't get 960x480 combined.
Result: almost a megapixel, square; it's really not bad from a hardware perspective, but I'm leery of the software. Give me Linux (Maemo, perhaps), and I'd be quite happy.