We're just a few days away from Sony's February 20th "see the future of" PlayStation event where we expect to see the next edition of its home console, and the rumor mill is buzzing. The latest one tonight comes from the Wall Street Journal, with a report that connects Sony's $580 million purchase of cloud gaming service Gaikai last year with a method to provide backwards compatibility on the PlayStation 4. The WSJ reports Sony has been "investing heavily" in preparing Gaikai for an influx of PS4-equipped gamers, while also developing better cameras for its Move and the