Miss out on the pre-alpha demonstration of Saints Row IV at PAX East? Me too. We can finally stop crying in the corner together now that Volition has put together a video of exactly that walkthrough. If this is the first you're really seeing of the game, prepare for some crazy sh*t.
It's not as big of a leap as Saints Row: The Third was coming off of its predecessor, obviously, but Volition does appear to be taking the series to its (il)logical conclusion with the addition of things like dubstep guns, mechs, and superpowers. My hope is that a common complaint from The Third -- that it didn't have the same scope of content -- will be addressed. Looks like good, stupid fun.