I've been carrying the new Surface Pro 4 for about a month, and it is pretty brilliant. I carried the old Surface Pro 3 for a number of weeks, but the relatively crappy keyboard eventually forced me to move to something else. The Surface Pro 4 keyboard is far more solid, and the keys far more comfortable. However, the really big change is the huge and very nice glass trackpad, which eliminates many of the really annoying problems with the older, smaller solution.
Microsoft Surface Pro 4The product is light (well under 2 pounds), attractive, and has decent battery life. When it's all I carry in my laptop bag, the bag feels almost empty. It is one of the first Intel SkyLake products, which means faster boot times as well as both longer battery life and better performance. The stylus also is improved, so it feels more like a pen. In addition to providing higher resolution and deeper colors, the Pixel Sense display makes it far more responsive to pen input.
This is the first of the new SkyLake 2-in-1s I've had to try, and it is impressive. Let's see how it holds up against the offerings that will be coming in over the next two weeks. For right now, it is my favorite and my product of the week.
As a side comment, I just came back from Dell World, and four years ago I noticed a lot of folks were using iPads instead of notebooks. Two years ago, most of those folks were using Macs. This year, almost all were back to PCs -- except there were about as many Surface Pro 3s and 4s as there had been iPads 4 years ago, and a passenger sitting next to me on the flight out had a new Surface. Could be a trend.