There is a problem somewhere. It's impossible for a mechanical drive to be faster than an SSD.
http://s878.beta.photobucket.com/user/laughingman09/media/Image2-1_zps8b5c1f75.jpg.html
I beg to differ, blue line is a pair of mechanical Samsung F3s in Raid 0, red line is a single Vertex 3.0. The Samsungs are clearly faster. Okay I've had to Raid the drives but it is in fact possible for mechanical drives to be faster than an SSD.
As for the Piston, if this in fact the fore runner to Steams own 'console' then it looks like that MS exec was right when he said that Valve proved to be no threat in the console market.