Personally, the biggest improvement to Windows for me would be the ability to install the same copy of the OS multiple times, personally, for a reasonable price

Personally, the biggest improvement to Windows for me would be the ability to install the same copy of the OS multiple times, personally, for a reasonable price. I have a laptop, desktop, and I'd also love to run a couple of virtual machines as well. I think having multiple personal uses is pretty common, and they need to change their licensing to be more flexible for that type of environment, without needing a separate license for each installation...