Yes, Yamaha own Cubase now, though it's still pretty independent and still based in Germany. They still have the annoying habit of developing new features whilst not finishing off fixing the bugs in the old ones. I'm waiting for the next release to see if they've fixed any of the issues I've raised. Their biggest one for me is their metering. They've got a great (in theory) control room meter, but they haven't implemented the K-metering on it correctly, with far too long an integration time for their RMS values, forcing me to use a 3rd party K-meter plug when it shouldn't be necessary.

I'm using a desktop PC for my home studio, so haven't been looking at portable devices, but that MS Surface Pro looks pretty cool.