Capcom gave PlayStation Vita an early show of support at E3 with the announcement of a version of Street Fighter x Tekken. But it looks like we'll have to wait until September's Tokyo Game Show to see the real potential for the portable version.
At an offsite Sony Computer Entertainment press event on the 9th (as reported at Impress Watch), Capcom producer Yoshinori Ono revealed that Sony and Capcom are working together on a new feature for the Vita version of SF x Tekken. He hopes to show this at TGS.
Ono provided just a few hints about the nature of the feature, saying that that rather than taking place in a closed environment, it will be something that lets you experience the full PlayStation family connected together. He also referred to it as a "new experience."
The Impress Watch article (I'm not sure if this is Ono's statement or just conjecture from the writer) likened the feature to how Capcom worked with Nintendo on Street Fighter IV 3D Edition to expand the 3DS's networking functionality.
Regarding the Tokyo Game Show showing, Ono actually wasn't totally committal about it. He asked that the press in attendance write that he believes they'll be able to show the feature at TGS, as this will end up putting pressure on the developers at Sony Computer Entertainment.
The event was also covered by Famitsu.com and Dengeki Online. They provided a few additional details on SF x Tekken as a whole.
In addition to the Vita version announcement, Ono announced during Sony's conference that Infamous main character Cole would be a playable character in the game. Cole will not be paid download content or something you need to activate. He will be available when you purchase the game. (I'm not sure if he's saying that the character will be available as a default character).
While the Cole character was demonstrated at Sony's conference on PlayStation Vita, Ono confirmed that he will also be appearing in the PlayStation 3 version.
There could be other special characters besides Cole, Ono also said.
http://www.andriasang.com/e/blog/2011/06/11/ono_sf_x_tekken_vita/