Many of us have seen the videos by now. Developers have figured out how to get full Windows 10 running on a Microsoft Lumia 950 or 950 XL. There's good news though, as you can now try this out for yourself.
There are a few warnings though. For one thing, consider the same warnings that you'd hear when installing a Windows Insider Preview. This is going to be unstable, the performance will be terrible (Windows on ARM is not designed for these chipsets), and you shouldn't plan on using your phone as your phone. If you've got an extra Lumia 950 lying around that you're not using anymore and want to try a fun project, that's the optimal use case.