I do wonder if these demos and trailers actually are a part of a marketing scheme aimed at building hype through misdirection, similar to what SE did with the FFVIIR announce, by first doing the PC to PS4 port announce.
After all, if I remember correctly the teaser they showed at the press-conference featured a brief glimpse of Racoon City.
This trailer also featured gun-play, promising action as well.
Are people forgetting that RE1 was a game largely about avoiding combat and conserving ammo, in an old manor, where finally you end up getting chased by a monster that's almost impervious to damage until you can finish it off with a rocket launcher?
Basically what I saw in this trailer seemed like a return to form in many ways mimicking the first title - minus the lab and quasi-science aspect of it.
Even first person perspective isn't new, as RE did this as early as on the PS1 with the Survivor games.
Hopefully, things will be shown to branch out as we get more information - with more than just a game centered around one family of crazies.