Surface Dial
In our tryout of the Surface Dial scroll-wheel, our main takeaway is that this is something we'd need to spend some more time with. It worked well for simple tasks like turning up the volume on the Surface Studio or zooming in on a web page, and it was definitely cool to try out the Dial both on and off of the display.
As a brand-new addition, though, we found there is unsurprisingly a bit of a learning curve with the device and, likely, a ton more that can be done with it in different apps. Some of the creative professionals at the Microsoft event were using the Dial expertly with illustration work, suggesting it could become another key enabling technology in creative professions in the future.