I agree with Anandtech the Pro 3 is almost there, but not quite. The Surface Pro 1 sold me on the idea of an everything device. It had its limitations, but it worked as a laptop, desktop, and a tablet. Each scenario had its limits and the most limited one was the laptop perspective. As a tablet it worked great with movies, browsing the web, light gaming, etc. As a desktop it was powerful enough to run the adobe suite on an external monitor. But as a laptop the kickstand and keyboard were not ideal.

The Surface Pro 3 removes some tablet usability and improves on the laptop experience. I am not sure if this is ideal. I recently upgraded from the Pro 1 to the Pro 3. I am having a hard time using the 12" screen as a tablet in bed and on the couch. Using the device with pen in hand is harder due to the larger screen real estate. Even using the Metro side of things is more cumbersome due to the larger screen. Tiles and settings on touch interface are too far apart now.

After a few days, I have concluded that the Pro 1 was a better "tablet" with the ability to be a desktop and laptop. The Pro 3 is more of a laptop/tablet hybrid with a focus on laptop-ability. Even with all the new enhancements, I think I will return the device and purchase a Pro 2 instead.

Edit: I used the Pro 1 as my main machine for almost a year. The pen was useful in photoshop/illustrator. I also used it for gaming; Fifa 2013, Civ 5, and some indie games.