If you're Microsoft and in the process of overhauling Windows so that it's equally at home on PCs and tablets, it would make sense to unveil a semi-final version at the world's premier wireless show. That's exactly what's going to happen tomorrow, when the company's executive team takes the stage here in Barcelona to show off all the changes it's made to Win8 since we got hands-on with the Developer Preview five months ago. Though we still won't know tomorrow what the final version will look like, we'll have a much firmer idea, as this will be the first version available to the general Windows-using populace. So what does Redmond have up its sleeve? Will the Windows Store open for business? A first look at some native touch-friendly apps? And what's to become of the Start button? Bookmark this page and come back tomorrow at 9am EST (3:30pm local time), when we'll be firing off up-to-the-minute updates. See you then!