Well, I'm surprised we are already hearing anything rumor or not about the fabled GTX 980ti (or GTX 990?). Seems like that was a quick run over all for Titan X but then again people this is all just rumors for the most part and not an actual release. They are probably waiting at least a month or so before releasing (most likely coinciding with R9 390X) unless they want to immediately butcher Titan X sales which is doubtful since Nvidia is smarter than that (I bet I know quite a few people who would return Titan X almost immediately is the release was close at hand).
I hope they choose the GTX 990 name over 980ti personally as they need to spread the two GPUs further apart in my opinion.
Also, anyone saying Titan X is more for the professional world and not marketed for gaming needs to read the box.
It's only major professional aspect is the ram which is good for people who do rendering for instance. (Not saying a box label is the only metric but it does point the card more one direction)