a) Airplane!, while hilarious, was basically a bunch of Jewish white guys offering their take on what "jive" talk sounded like, so while it's funny to us now, as people who are close to three decades removed from the "modern day" trend that it was satirizing, at the time, it was probably closer to former Senator Ted Stevens complaining about how one of his assistants had sent him "one of those Internets" (ie. an E-MAIL) that had taken so long to get to him. In other words, it's Clueless White Guy Culture making fun of other cultures that it doesn't really UNDERSTAND, which makes it kind of embarrassing to watch now.
b) If anything, languages SIMPLIFIES over the years. If you want a better approximation of how the future will affect our linguistic patterns, watch Idiocracy.