In a few of the real estate offices I've worked with, Surfaces have become standard equipment. They primarily want Office, strong PDF support, and support of various proprietary features on websites. The latter two are especially useful, since a single contract, including cancellations, edits, drafts, etc. can normally take a full ream of paper. By going digital, they can save on the paper and toner. Most of them already have some degree of experience working with Windows systems, so the familiar interface is useful and the pen is much more intuitive to work with than signing with a finger. And, more importantly, looks like an actual signature/faxed signature which means it's trivial to get legally recognized, even if it doesn't go through an official e-sign service.
While it's not for everybody, there are definitely pockets where the Surface is popular and encouraged.