Re: XP 2.0?
Not really. Having been part of a migration from XP to W7, I can tell you that there are plenty of pitfalls to migrating directly between the two.
1. Drivers. Let's face it, not every device you may have used under WXP will have drivers on W7 and the existing WXP drivers, while some might actually work, quite a lot don't. You end up with the headache of how to work around this or, in extreme situations, replace.
2. Bad programming. To be honest, this is not directly a Windows fault but it goes back to the bad old days where a programmer expects all users to be running as a default administrator straight out of the box and does not plan services properly. This causes all sorts of problems with file access, database access and in some extremes profile access.
3. Functionality changes. Not every single WXP option or control has its analogue in W7 and, when they do, it isn't quite what you expect. One example was the "root certificates" which, on WXP, was updated regularly as a Windows Update patch but, on W7 and Vista, is supposed to be updated on the fly as it is needed which does not account for possible security issues. This leads to plenty of certificate errors on otherwise legitimate sites.
That's before we get to the "where did x function or y control go" which is a problem with every update of Windows since the very beginning.
Yes, WXP to W7 is a good way to go on the whole, but it's not a painless procedure and it certainly couldn't be called WXP V2.0, though given W8 and all that has occurred, I can still see W7 taking hold of the market for a similar amount of time, despite Microsoft's bullying tactics when it comes to selling systems.