See http://futuretimeline.net/21stcentury/2019.htm#copyright . I have no doubt that when 2019 rolls around, if Disney et al. (I mention Disney specifically instead of the RIAA or anyone else because Disney seems to be the one really at the forefront of the copyright extension issue every time it comes up) are still around in any significant form (hopefully they'll have been thoroughly disrupted years before then, but you can't really predict the future, etc. etc.), they'll be pushing for another extension to copyright terms. However, there's no guarantee that said push would make it through Congress, especially given recent victories over legislation such as SOPA/PIPA and efforts to disrupt the industry. The website presents its predictions in light of current laws and trends, since anything else would end up being too complicated from all the possible "what-if" alternate timelines.