What features and other things, do you want to see Microsoft implement in Windows 10?
I would like to see a tabbed file explorer (big league), a copy and paste bin as well as universal copy and paste.
A complete redesign of the file explorer, and move away from Windows 8/7 style.
More customization, allow users to change the theme in Windows 10. From a Windows 98 theme to even a Linux inspired one.
More sophisticated, Windows 10 exclusive apps, like a photos app with better editing tools, and a revamped and more robust Windows Movie Maker.