The Surface uses the same digitizer as most Tablet PCs, the same technology as the old ArtZ tablets, so has hardware support for ~240 levels of pressure, and has finally gotten driver support:
http://www.theverge.com/2013/5/10/43...river-download
Like anything, it's a trade-off, but it's not as clear-cut on the pressure angle as it is for screen size, weight and battery life.