Say bye bye to win 32. Not today, not tomorrow. But it will be gone. 100% sure. Enjoy it while you can.
That would be corporate suicide on MS' part... totally!!! Too many business and home users depend on it for their day to day business and activities for Win32 to disappear. Besides, Microsoft would lose ALL its 'legacy' partners, who have invested billions in software development... and while MS is the 'core' business, it is nothing without its partners. I mean, who is going to shell out hundreds of dollars for an operating system that is... well just that and nothing more. It'd be like that Meatloaf song... 'All Revved Up And No Place To Go'
While I quite like the Metro/ModernUI for phone and tablet use, I certainly wouldn't want it as the only method of interacting with my desktop PC. I do things that require legacy applications on a multi-tasking desktop, so if MS were ever to release a ModernUI only OS I would simply refuse to purchase it... period. And I am only one of billions with this mindset.
Simply put, MS would have so few customers who'd view the 'ModernUI' as a viable alternative, it would have no option but to revert to 'legacy' a desktop purely to remain alive. But frankly, I don't see it ever getting to that.... because MS' partners, as a combined force, would not let it. They have far too much to lose... as does MS. For example, Adobe's content creation suites are far too complex a piece of software to place in an app or 6, or 10, they need a more powerful legacy desktop in which to function, and Adobe, along with scores of other 'legacy' developers, will fight MS tooth and nail to ensure their products have viable futures.
As for the 'Cloud', while it may be a viable delivery platform to some multi-billion dollar corporations, it would be an enormous undertaking to place entire content creation/editing suites in the Cloud, and many of the smaller, yet still powerful, companies would not be able to afford to mount such a mammoth operation. For a start, the costs of servicing billions of customers worldwide with entire cloud-based software suites would be so enormous it would preclude many developers, that's if they could afford the initial setup costs to begin with...
Yes, some developers, such as Adobe, have made use of the Cloud as a distribution point, but that is more an alternative sales point to those who prefer it, rather than a complete shift in that direction. I mean, seriously, which company could, realistically, service [say] 5 - 6 - 7 - 8 even 10 - 12 billion 'Cloud' customers, all using very powerful and complex content creation suites all at the same time? No, companies like Adobe, Corel, Nero will still distribute their software via download or hardcopy because it is more cost effective for them... because the majority of consumers want what they pay for physically on their machines, not off in some intangible 'cloud'.
The other reason we may be saying bye, bye to legacy Win32... legacy Win64, which is faster and more responsive, is taking its place.