Actually tablet laptops have been around for awhile, I've had two so far. The first one I got was a HP Touchsmart TM2, I think I got that back in 2011? I started doing lots of reading up on it cause man I just wanted a digital sketchbook that didn't need to be plugged into the computer like a Cintiq.
I'm currently using a Samsung Series 7 Slate that came out in 2012. It uses Wacom drivers and runs Windows 8.
There are others too - a good place to look and ask is actually
TabletPCReview. They have a section dedicated to helping people choose the best tablets for what they need and someone even has a
thread up asking for advice on the best Tablet PC / Notebook for Art.
I had to do a lot of research to find a laptop that I wanted and dug through a lot of threads before I settled on my Samsung. It only has 256 levels of pressure sensitivity and from a few threads it seems the digitizer uses Wacom 2 pens (so your newer pens like Wacom 3+ won't work and you'll need to go buy another one if you don't want to use the stock standard stylus that it comes with. I use an Axiotron tablet pen that's essentially a fatter wacom stylus).
Back at that time the other main competitor I think was the Asus EP121 which I believe also used Wacom drivers.
Since I'm still very happy with my Samsung I haven't bothered looking at what's out in the market now.
These are some photos I've taken while working on it - I also live stream on it so if you're curious to see it being used live I can link you.
And here's a review on it by
Finni biggrin