It was really interesting - especially the comments about the pointlessness of the mouse!
Now it's happening all over again, but with touch instead
The desktop PC isn't going anywhere though, and MS keep pointing this out. They mention it in that blog post as well. Their will
always be a need for the desktops/larger form factors but over time the market will keep shrinking until the only people who use desktops will be people who need serious processing power and hardware customisation for things like 3D rendering, scientific software, video editing, game/content creation, gaming and hardware enthusiasts.
But having said that, laptops have been outselling desktops for years now (by about 70 / 30 at the moment), and this year it's already predicted that more tablets will be sold than desktops, so MS certainly need an OS with good touch support or they will die a slow death or end up like OSX or Linux with some tiny market share. Theirs no uncertainty that more people will be using tablets than desktop PC's soon.
I'll always have a desktop though because i do things like graphic/web design, rendering and gaming, but i'll definitely be upgrading to Win 8. Theres loads of new stuff in the desktop/Windows Explorer UI... 'Storage Spaces' and the improved multi-monitor support alone will highly benefit me. People are too focused on the touch stuff just because it's something new, so they overlook all the new desktop area features. The desktop in 8 actually has more stuff added and improved than Win 7 did over Vista!
MS's goal has always been to have one OS that does everything with no compromises. For 90% of people they just need a tablet/laptop hybrid like the Asus Transformer Prime (tablet + keyboard dock). Why would average consumers have any need for a large desktop PC? Most people just browse the web on them! They dont play things like Crysis or use rendering software. They dont need 6+ core CPU's, multiple hard drives with TB's of space, tons of RAM, PCI-E add-in cards or optical drives. A desktop form factor is wasted on them, all that extra space is unneeded. They just need something thats small, light and mobile, that can be attached to keyboards + mice and monitors/TV's when they're at home. Everything their desktop does, plus all the software it runs, a Win 8 tablet could just as easily do. They wont be gimmicks like the iPad.
I think MS have got it spot on. Once the new hardware starts appearing later this year people will finally start realising this.