From what I've gathered from the trailer, SFV seems to have air combos, guard breaking, and ground bouncing, but there is a few other things that caught my attention after watching the trailer.

Ryu has a second fighting stance, electricity coming out from Ryu's fist, and both Ryu and Chun Li seem to have power ups. Now I'm not sure what these power ups do, or know if they have some sort of elemental properties. I just know that they look cool.

Until there is more footage and screenshots, this is all I got for now.

Here is Ryu (P1) normal fighting stance.

Here is Ryu again, but with a different pose.

Ryu's power up seems to electrify his fist.

Here we have Chun Li power up.

Now of course there is graphical improvements. Comparing from SF4 on the left and SF5 on the right.

Very good eyes.

Also Ryu and Chun Li both seem to be able to make Chinese languages come out of their bodies in Street Fighter V.

Yeah. I wonder if they're going to bring Ultras back.