Here's the real kicker: it's fast. It's smooth. It renders at 60FPS unless you have a lot going on. It's unequivocally better than performance on OS X, further leading me to believe that Apple really needs to overhaul how animations are done. Even when I turn Transparency off in OS X, Mission Control isn't completely smooth. Here, even after some Aero Glass transparency has been added in, everything is smooth. It's remarkable, and it makes me believe in the 12-inch MacBook more than ever before.
King notes that while Windows 10 does look and run great, there are some current compatibility issues with the new MacBook. For instance, there's no bluetooth support and some boot camp drivers were not automatically recognized. Additionally, not all applications scale natively and do not support the full resolution of the retina display, causing the applications to appear blurry.
The new 12-inch Retina MacBook is still seeing lead times of 3-5 weeks, despite launching about a month ago. If you're lucky enough to get your hands on one, try out Windows 10 and let us know what you think.