Microsoft unveiled their new and improved lineup of Surface tablets on Monday. You know, the tablets they’re hoping you’ll buy just before selling your old Nexus through their buyback program. Remember, this is an upgrade on a product line that Microsoft is hoping will turn damp and rainy Redmond into sunny Cupertino; the line that was behind a $900 million write-down just a few months back. Just in case you went to a public school in the U.S., 900 million is getting pretty darn close to a billion.