I just remember some previous Windows releases that were foisted on an unsuspecting public and got a bad rap from which they never recovered. One took two major service packs (Vista) and the other a complete rethink (8 to 8.1). Lets not go for a third. Do everyone a favour and release Windows 10 when it more than ready, so it can be the best version of Windows ever. At least give technical users the option to upgrade early and less advanced users can upgrade later with DVD's possibly provided by the OEM.