Why no Monster Hunter 4 on Vita?

Sony has responded to the shock announcement of Monster Hunter 4 as a 3DS, not Vita, game.
When asked whether Vita owners will also get MH4, Sony Computer Entertainment Japan president Hiroshi Kawano answered, "I don't know."
"You will have to ask Capcom," he told Reuters.
Sony Worldwide Studios boss Shuhei Yoshida was more optimistic. "Most game publishers operate on a multiplatform basis," he said, tossing Vita gamers a dinosaur-sized bone.
Monster Hunter became a Japanese phenomenon on Sony's PSP machine. Monster Hunter Portable 3rd, released December 2010, has sold nearly 5 million copies in Japan alone.
The 3DS will also welcome a port of Wii game Monster Hunter Tri. In order to cope with this, Nintendo has had to develop a clip-on 3DS attachment with a second circle thumb-pad. Eurogamer got its grubby mits on the 3DS Circle Pad at the Tokyo Game Show this week.

http://www.eurogamer.net/articles/20...nter-4-on-vita