Pretty good way to think about it. If we promote Steem as nothing but blogging, we're obviously limiting our reach. DApps like DTube, Steepshot, and even games like Steem Monsters really help onboard new people, but the apps come first in order for this to help.
Getting new users through the registration process is tough though, due to RC. I'm hoping that I'll be able to release a number of games and smaller DApps on Steem in order to build my SP, which I'll then use to get a shit ton of accounts that I can offer out to new Steemians with larger scale apps.
Basically, my plan is going to be: make games for current Steemians -> get SP from that -> use SP to create accounts -> build large scale apps for adoption by outsiders -> use created accounts to make sign-up feel natural -> look back in awe about how great Steem is 2-3 years from now
I hope I'll see you all there :)