I hear what you are saying. And in so saying, you identify as not the target market, IMO. You clearly know what a server is, and is for. If this Mini is targeted at the "home server" market, it's targeted towards those who don't know or care what a server is or does. "It Just Works" - but what does it do for Joe User that his PC/Mac does not already do?
People know the advantages of home storage. And I'd swap out my Ultra 5 for a Mac Mini, just for the power consumption and the space savings.