Release won't be until next year. Developer preview due the end of this month. Then regular updates until RTM. Looking forward to a couple of things (start menu isn't one of them, don't use it, don't miss it). Windowed store apps is probably the biggest. Any store app can run in a window on the desktop. Consider what various frontend software might do with that feature. All depends on what level of communication Microsoft opens up between the desktop and store apps. Time will tell.