1. Nonsense. As another poster has said, the only thing stopping you is your conscience. I bought an upgrade version (was eligible several times over) and performed a clean install as recommended by Microsoft. Microsoft is fully aware that this is possible and is not going to "fix" this. I thought everyone knew this by now and how to do it.
2. The fact that Vista does not exactly fly on a VM should be your main concern here. Moreover the EULA is null and void outside the US, and probably within it, too. If you paid the money for the software, who the hell is MS to tell you what you can run it on?
3. I bought a retail upgrade and got both disks, so no. Very few people will NEED 64 bit now, and those will sort out their drivers before diving in, anyway.
4. Volume licences?
1) as i said - if you wanna ignore conscience, legalities etc. there are many things you can do to bypass WGA, upgrading, clean installs etc. But by that token, you can do anything you wanted to really, legal or not.
With Tiger (or any OS X), you can just bang in the disc, reboot, and perform a clean install if you want. Not so with upgrade versions of vista.
NB. if you have an upgrade disc I'm fairly sure there is no where in the world where you'll find MS
recommend you do a clean install. They explicitly say they expect people to upgrade with an upgrade disc.
2) VM wise, I'm sure parallels and VMware will eventually get their products to a stage where Vista is smooth enough to run in a VM (like XP is now). And buying software from MS isn't strictly true, you
license it, and officially you're meant to go by the rules they set. Technically you're
meant to follow the EULA - if you wanna do what the hell you want with no regard to that then whats the point of getting legitimate software?
3) Yes, but then all those OEM vista 32bit buyers are left in the lurch aren't they? My point was that OEM discs are specific to the version you bought, you can't upgrade to 64bit later without just rebuying Vista 64bit (whether OEM or retail).
4) I'm no expert, but from a consumer standpoint there is no easy way to get volume licensing for a couple of PCs I have at home. All MS's open licensing schemes seem geared for companies from small business to enterprise. Unlike the Tiger family pack I can get from the applestore, install on 5 macs I have at home and be done with it.
EDIT:
http://www.microsoft.com/licensing/options.mspx
Customer: Home users or small businesses requiring software for fewer than five computers
Description: Individual packages of licensed software purchased at retail
How to purchase: Licensed software can be purchased through any software retailer.
Clearly MS expects home users to shell out five times at retail - hence my original point on how Apple does family packs better.