Tekken games have been usually developed on specialized arcade boards, normally based on Playstation hardware (Tekken Tag Tournament 2, for example, is developed for Namco’s System 369).
Rumors are beginning to circulate about Tekken 7 and Gundam VS being developed for a new Namco Bandai Arcade system, System 478. This new board could be based on Playstation 4 specifications but, obviously, all this info is not confirmed by Namco Bandai.
Unfortunately we don’t have more info, but perhaps at Tokyo Game Show 2013 Namco Bandai shows a new Tekken or Gundam game based on this board.
Stay tuned.
Thanks, NeoGaf.