- your advisor
- your committee
- your friends (to see if they've been acknowledged)
- your parents (who don't necessarily read it so much as keep it as a trophy/proof that you can now get a "real job".
So if there are any graduate students reading this, my recommendation to them is: take the time to expound on your area in an introduction. You are (or should be) an expert on this topic by now, and your voice is authoritative enough, even if you may not feel that way. The reward, of having someone read your work and appreciate it, is something that can be surprisingly elusive.