Hey, at least we're not the only ones postponing releases!
Originally planned for May 3 release, Futuremark delayed the long awaited system benchmark to this Thursday, May 12, 2011. According to Oliver "Ollie" Baltuch, president of Futuremark Corporation, the company decided to delay the launch due to last-minute fixes and tweaks in order to ensure stability of performance results.
Given that the last PCMark worked on Windows Vista alone (runs on Windows 7 too), don't be too surprised to hear that the only OS that can run PCMark 7 is - Microsoft Windows 7, of course. Futuremark decided for such move in order to ensure complete system optimization across the board - regardless of what hardware you run, Windows 7 should yield apples-to-apples results.