It's really just Mac (the desktop line) and Macbook (the laptop line). It's simple.
The problem is that Surface can mean anything. It can mean a tablet, a laptop, or a ginormous screen or table e.g. Surface (a tablet, a table, or a laptop?), Surface Pro (a more powerful version of the tablet, table or laptop?), Surfacebook (another version of the tablet?)
Am I wrong? Think about it. Why would a blog post complaining about the absense of a great PC laptop get so many upvotes on HN when MS has the answer in the form of a 'Surface'? imo something is just really wrong with MS's marketing.