Sony seems to be teasing some sort of Street Fighter announcement via the guise of a viral video and website.
A video sent to VG247 shows an ad for a new taxi company called ‘Hadouken Cabs’ and it is full of PlayStation 4 and Street Fighter references.
Having slowed the video down, the site discovered both a picture of the DualShock 4, a number plate which says PS 1994 (The Street Fighter Movie was released in 1994 as was Super Street Fighter II Turbo) and a link to a website. Visiting said website and calling the operator results in yet more Street Fighter references.
Here's the video.