"Liberal" is maybe the most overloaded word in politics. "classical liberalism", "economic liberalism", "liberal democracy", what the American right means when they say "liberals" - all WAY different.
I feel sure it's going to happen in the next several decades. More and more people on the left are not liberals or are even anti-liberals. The right is currently dominated by a wing that's not traditional-conservative. Arguably that's been the case at least since Reagan, actually - the word "conservative" has dramatically shifted in meaning over the last 75 years.