Interesting question - obviously because they've a vested interest in a one-OS-one-app-platform-everywhere strategy Saracen. Seems fairly obvious to me - the fact that it isn't right or 'there yet' for all users isn't contentious either. If they didn't do it then nobody would use it - as is the truth (like it or not) is that by forcing the issue they'll get commitment to it as a platform change. It rather reminds me of UAC - Vista introduced it like an A-Bomb to Windows users and yet now it's largely accepted because it was refined in 7. You have to start somewhere and UAC was all about breaking developers away from MS-encouraged habits as much as getting end users to consider not being admin for browsing facebook.. Obviously something with the level of UI changed as MUI is far worse for end users since it's arguably far more 'in your face' but getting WinRT/MUI off the ground remains the goal and it was only ever going to be an ambitious one.
So 8.1 will refine a few things, appease some and still leave some others upset. Point is, unless they make it substantively *worse* the noise will die down and (maybe) they'll achieve their goal. Question is (as always) is it the majority that won't be happy (as some maintain) or is it a vocal minority? Further, are their concerns founded in genuine usability issues or just 'gahhhh it's different' type thinking (which I see all day every day as a developer).
Chicken and egg all the way - both in terms of getting a new platform (WinRT versus Win32) off the ground and introducing new ways of interacting with your PC. I don't subscribe to the view than input devices are mutually exclusive (this is nonsensical in a World of PCs with keyboards AND mice) and nor do I think we should confine our thinking about interfaces to be constrained by just one of them. After all, with the mouse, your entire arm and digits are reduced to a single 2d interaction point and with touch you can't see through your digits or point accurately at a single pixel. I'm spending a great deal of time playing around with an ASUS tablet with pen, finger, keyboard, touchpad and mouse - it's a surprising experience in that your realise some things are better with one or the other.
Great thing is you'd don't have to use it yet - sit back and wait till they get it right for you - or, alternatively, use one of the myriad free and paid-for solutions to customising it to your needs (real or otherwise). I'm pretty happy with it myself - the annoyances are periphery in the main and the improvements to the areas of the OS I do use are now something I can't go without having got accustomed to having them there.
For the record, I'd like the Start button back simply because it's visual (the reason why it's gone is because tablets have a physical button and I guess they thought 'well keyboards do too') and better when working with VMs, RDP etc. I'd point out i never really click it otherwise though.. I'd like them to fix legacy program grouping on the start screen (because it's a mess visually) - i.e. the equivalent of folder groups. I'd like less of a mish mash between control panel items (some in MUI and some in 'legacy' is clearly 'not done yet' stuff) and for them to get a bit further down the line with whatever they're doing with windowing apps because the splitting is pretty ugly right now. Not sure if modernmix is the right approach though..
Ponderings, nothing more. Perhaps I'm more patient than some or my perspective differs as I face user critique on my own software and changing anything meets with opposition in almost all cases.
If I qualify (?) - well I do. But I also like 8. Mostly. Is this OK?