I agree with this, they said Vista would be the last 32bit Windows OS, then 7, then 8 and now apparently 10.
Who supposedly said this? It certainly wasn't Microsoft.
However I suppose they're trying to kill off 8 as quickly as possible.
No, the scheduled late-2015 release of Windows 10 will put it at the standard time frame for release dates. Look at the number of days between recent Windows versions: Vista: 996, Windows 7: 1100, Windows 8: 1091 (estimated). Every release some people claim that Microsoft are rushing out a new version, but this is only because they are comparing the OS lifespan to XP, which was artificially long.
Everyone on 8 and 8.1 is getting upgraded to 10, so it may as well be 8.2
No, that was just a silly rumour. There is no doubt that Microsoft will do a special upgrade deal just like they did for Windows 8. If they didn't make Windows 7 free after Vista, why would they do it this time around? Surely those people who really dislike the version of Windows that they are using will be more motivated to give Microsoft money to upgrade than others, so why wouldn't they take it?