I guess it makes sense, were Remedy going to make two gameplay demos, one for E3 then one for Gamescom 8~ weeks later? Perhaps it was unrealistic to think they might, I'm still disappointed though.
I wish rather than just "HEY GUYZ WAIT FOR GAMESCOM" we'd got a new trailer for it... but never mind
I guess this opens up some conference time compared to what we were expecting. I think we will see Crackdown do the same thing now (although that might at least get a new trailer at E3). Scalebound gameplay demo at E3 with some of late Spring 2016 mentioned, date at Gamescom with a new trailer (but no demo)?