Which ultrabooks have a 600dpi pressure/angle/tilt sensitive stylus on a 1920x1080 screen?
who cares? They don't have them because they aren't necessary for a laptop.
And for the tablet functionality, yes - virtually any tablet will get you what you need. Using the Surface in "Desktop" mode is fucking unfortunate if you've ever used one, it is just unusable. It isn't leveraging that 4GB of RAM for metro, sorry to tell you.
After the last of 16 mounting screws has been removed from an access cover, it will be discovered that the wrong access cover has been removed.