Alyoshka:
MS doesn't need to prove crap to you.
If you have ever seen an OS install in less 5 minutes then you really must be something. Try the developer editions and then open your mouths.....
Win 7 never proved anything other than what most people believed, it's an OS for people who hate to read, are more impressed by looks than by quality and guy's who didn't have the balls to try anything else so they waited for MS to finally come out with a problem less release. Win 7 was a little tweaking of Vista with a new look and feel that's all.
Win 8 is the next OS after Vista..... simple.
And as you say you'll wait for Win 9.... I can understand that 'taker and not giver' mentality, it is in you.