"The Day After Tomorrow" is
not preparing us for any kind of future. I've seen more well presented science in movies on MST3000 than this
fluff!
Now, movies like "Outbreak" and "Deep Impact" are about more realistic worst-case scenarios where things go bad for humanity. But even here the
possibilities are slim -- and I mean
really slim!
If there's one thing Hollywood won't ever get right, it's reality.

Not even theoretical reality! Just ask any scientist, engineer, historian,
military officer, sociologist, or psychologist how realisitic movies & TV shows that have those elements in them are...