Posted 22 January 2015 - 04:33 PM
Windows 8/8.1 could basically be seen as a very rough blueprint for Windows 10. Win10 basically takes all of 8.x's ideas and either expands on them or tweaks them a bit to be smoother. The most noticeable change off the bat is the return of the Start Menu, which has been merged together with the Start Screen. It's pretty much the classic Start Menu, but now there's a pane attached to it containing the tiles for Modern apps. I think the setup can be tweaked a lot though, to make the pane larger or smaller. Other changes include Modern apps being windowed now, and dynamically changing their UIs based off of user input devices and screen size. In fact, the UI in general adapts better to different form factors. For example, if you're using a Surface Tablet with a keyboard attached, it looks a lot like a classic Windows desktop, but when you detatch the keyboard the taskbar icons get larger and Modern Apps adjust to be more touch friendly.
There's a lot of other changes too, big and small, but overall the theme seems to be reinventing Windows 8.x to meet user expectations while still growing the OS in the ways MS always intended.