So, here's a brief summary of what I think about Surface 3:
- Great for drawing/sketching/art and taking notes. The stylus is extremely responsive and OneNote integration is just awesome. It has a very low latency in terms of when the stylus is placed at point (x,y) and when graphics are drawn for that location.
- OneNote -- probably my favorite app of all things on the tablet. I probably spend more time with this app than any other app. It is great for taking notes, typing, drawing diagrams, drawing cartoons, etc. Palm rejection is awesome on this.
- Runs any Windows desktop application. I can install and run iPython on the tablet and do some scripting/analysis.
- Keyboard automatically disables when flipped back. Unlike the Nexus 9 keyboards, you won't accidentally press keys when you fold back the keyboard cover.
- Battery life is awesome. I've gotten through the day with the device. Though, can't say the same if I play videos/games.
- Screen size sucks. It's very hard to read text for Windows applications that don't conform to display font settings (e.g. Line).
- Processing power is underwhelming. It's not great for doing heavy computation and sometimes a bit sluggish.
- Limited Apps. Even for drawing, there's limited number of apps available for drawing. Sketchbook is terrible through the Windows App store. Though, Sketchbook Pro from the native desktop application will run. It just has no palm rejection.
- Lack of palm rejection for desktop windows applications.
I recently gave up my Intuous Pro tablet in favor of this device. It's an awesome device for drawing (I use Sketchbook Pro desktop application). I haven't found any other good use cases for the device except for drawing, reading, note-taking, and the occasional iPython scripting.