As a Windows user of many years, I'm sure I wasn't the only one caught out by Windows Vista's novel upgrade DVDs which didn't allow a clean install of the OS. It astounded me at the time that Microsoft could contemplate rewarding loyal customers by selling an upgrade DVD that doubles reinstallation time of Windows in the event of any problems (I returned my DVDs as soon as I discovered the limitation and, somewhat annoyed, purchased full version DVDs... what business user has the time to waste installing an OS just to wipe it again?)
Given that every other Microsoft upgrade product in history (including the recent ones - cf. Office 2007 Upgrade but right back to Windows 3.1 days) has been capable of asking for a previous product CD/DVD to prove upgrade eligibility, will Microsoft be punishing loyal users with this same irritating limitation on Windows 7 upgrade DVDs? Having built up an *old* laptop with Windows 7 RC and my full software profile, I shall be wanting to get Windows 7 the day it comes out so would like to know the details of the upgrade DVDs in advance!