Super Street Fighter IV will have plenty of great additions to warrant the $40 purchase.
For me, the most important is the ability to play matches online in a virtual room that allows you to hang out with up to seven other people, chatting and watching the current fight.
But a lot of people are more interested in the game's two new characters. Korea's Juri and Turkey's Hakan. I went in to the preview build of the game and captured this video just for them.
The video shows the command list for both fighters. Hakan, a grabbie character, has the Oil Shower, Oil Slide, Oil Slide Body Press, Oil Rocket and Oil Dive, while Juri, a quarter-circle fighter, has the Fuhajin, Shikusen, Senpusha and Kasatushi.
Then I tried to execute these moves. I eventually managed to get all of the attacks off. Be patient, they're new to me too!