I'm not saying that we won't get gameplay footage or that the press might not play it until then. This is just the first time a public demo might be available.
This is pretty much confirmation that a demo will not be at GDC or PAX East for anyone hoping it would be.
Edit: Yes I know Quakecon is tradionally an Id event but they are under the zenimax umbrella now. The presser also said "bethesda softworks games" not just "Id games".