My Surface Pro 1 is my main, and mostly only, computer.
Nah, I primarily use mine as an e-book reader.
I take it with me when I leave the house too for my mobile use.
But, being retired, I don't have any ' work ' to do, except keeping my Quicken and stuff organized.
My desktop is much more powerful than my Surface Pro.
It is an I-7 running at 4.2 gz with 16 GB of RAM.
Love the Surface, no question about that, but for REALLY doing something I use the desktop.
Also being retired, but traveling a lot, I prefer to keep my latest records and such on the Pro. I also use it as a Kindle reader, but that is what I've used most of the tablets I have owned for, as well. I have an ASUS laptop with an i7, 6 GBs of ram, an Nvidia 460M video board and such in it but it is too heavy and awkward to carry around. Besides, the Pro is much faster in all respects except for heavy duty gaming or Photoshop work, which I seldom do.
My Pro is attached by three cables to a 27" monitor, external keyboard, mouse, an external Blu-Ray drive, printer, scanner, and 6 TB of storage. Everything I do on the computer goes with me as soon as I disconnect the 3 cables and put the tablet in the carry bag, which in turn goes in my backpack. I plan to take it to China soon, just as I took it back east for a couple of weeks in NYC and environs.
My most important advantage of the Pro is the fact that a fully equipped, 2 lb computer can easily fit into my backpack and go with me on trains, boats, planes, and walking trips without breaking my back.