Oh, Sony. Its earliest Android tablet efforts were a little odd (and thats putting it politely), but the company eventually managed to get its act together. Last years Xperia Tablet Z? Easily the finest Android slate that Sonys ever made. When it came time to craft an upgrade, though, Sony was faced with a choice: Should it try to push the envelope in a different direction? Or simply stay the course and apply a healthy dose of polish to an already-good device?