Does anyone have issues with web sites giving you simple/basic versions of web sites on IE10 whereas you would get a more fully featured site on iPhone or Android? I was playing around with the WP8 emulator and google sites (i.e. google search, docs, images, gmail) look terrible with no dynamic elements, just basic html, whereas on iPhone it is much better.
I have a feeling this would extend to a great many other sites, crippling the web browsing experience.
It will change as web app devs start building apps properly by checking browser capabilities vs user agents. Things like modernizr make this even easier - and responsive web design has started to pick up steam.