There we go then - we have Street Fighter IV, Super Street Fighter IV and now Ultra Street Fighter IV in the form of a full retail game or a Super Street Fighter IV. Here's a thought - just release Street Fighter V, what's the problem with doing that? Capcom's been doing this for ages, it's really annoying.
Yeah, I agree with you. Though Ultra seems to be the final definitive version since it has the edition select and whatnot. It all comes down to EVO and fighting game tournaments in the end though. Fighting game fans will buy upgrades so that they can practice on the new build and play well in the next tournament. While updates might seem cheap to people outside of the Fighting Game Community there's no denying that Capcom is keeping the SFIV tournament scene alive with all these updates.