Nobody would mind a better OS, but when the GUI has reached the pinnacle of usefulness, why try to force a change?
To entertain everyone with the ever popular car analogies, a car has a steering wheel, two or three pedals and a dashboard with a more or less common way to display what you want. The designs changed over time, but that's fairly constant. Why? Because it's been tried and proven as useful and intuitive, and people all over the globe know how to deal with this. It works. It works great. You don't see car manufacturers try to come up with, I don't know, a HOTAS setup for cars (well, maybe in some far out "concept" cars to entertain the press, but sure as fuck not in series cars) or try to be "creative" with their user interface. Despite heaps of changes under the hood in the past decades. Quite seriously, cars ain't the same they were 2 decades ago, but the user interface didn't change at all!
And? Do you see people lament and complain how they don't need a new car 'cause it just looks like the old one? Slap on a new paint job and design the exterior differently and they'll go "ohhh shiny!" and buy it.
Same for GUIs. Keep the user experience the same, just round the edges and make it flashy and gadget-y (and PLEASE allow us to disable all the blinkenlights, for those that don't want SHINY but rather go for useful).