Sony's major Mobile World Congress product reveal turned out to be the very same slate it had already taken the wraps off of this past January in Japan: the Xperia Tablet Z. Now that the 10-inch Android tablet's been officially announced for global availability, it's time for it to start trickling out to market and (surprise, surprise) Japan's getting first dibs. Starting March 9th, NTT DoCoMo will begin accepting pre-orders for the LTE-enabled tablet (in black or white) wit
