If I hold an event in Chicago called "An evening for families," that doesn't mean my definition of family somehow includes living close to Chicago. Just that this event happens to be in Chicago, and this app happens to be for Windows/Mac because of implementation/demand/whatever reasons, not because of some definition about hackers.
in your OS/physical-location analogy, what's the interpretation of cross-platform support?
Welcome to the new meaning of "hacker": the Macbook packing hipsters churning out web "apps" at your local coffee place.
Sounds like marketing, not engineering. The "DBaaS operated by IBM" backend also doesn't sound hacker-friendly...