Remix OS is a modified version of Android that can run on practically any PC. It remixes Android into a desktop operating system, complete with applications running in windows, a Start menu, taskbar, ...
You point your browser at a local IP address or hostname and suddenly you have a full XFCE desktop running in your browser.
It appears that turning Android into a desktop operating system is Google’s next big consumer initiative. To put it bluntly, I think this effort fails if all they’re doing is making a one-to-one ...