Obviously, some people may not be able to answer this question. They're still not sure when they'll pick up a next-gen console and even when they do, they can't say for certain what their absolute last current-generation title will be.
That being said, I think many hardcore gamers have a tentative plan in their heads. Many either intend to trade in their current systems or simply banish them to the closet. Besides, this generational transition may be quite abrupt; it's long overdue and most developers and publishers are looking forward to the new era. That's why we have an idea of what to expect in 2014 and beyond.
Speaking of "beyond," I'd have to say the last current-gen game I might play is Beyond: Two Souls . It's slated to arrive on October 8 and honestly, I can't think of another PS3 or Xbox 360 exclusive after that. At least, not one that interests me. Can anyone think of any that are coming next year? I believe pretty much all of them will either be cross-gen (available for both current- and next-gen consoles) or simply only available on the PS4 and Xbox One. For the record, my next-to-last current-gen game would probably be Grand Theft Auto V (September 17).
How about you? Got it all planned out?