Rewind and Fast Forward will likely stick around for a while, because they have become common in the vernacular, and, while "tracking" may be more accurate in digital media, the actions have the same result, thus allowing the carry-over of the terms. Nothing unusual. Terms carry over all over the place. We still "hang up" our phones, right? Even cell phones... which we never, ever hung up. We call "shotgun" when, really the origin of that term doesn't apply (for the most part... I hope) anymore. You ever "CC"-ed someone on an email? Carbon copied. When was the last time anyone actually used carbon paper? Maybe Halloween, to put a pattern on a pumpkin. Every car has a dashboard, but dashboards were originally just boards put on buggies to block dirt, dust, and mud when horses "dashed." Some of the phrases/words die, but some will hang on and legitimately make no sense to future generations. Of course, I'm old, so I hold on to some even knowing the correct current phrase. You young people make playlists, but I still make Mixtapes... even if they just go onto my MP3 player.