It's based on bad science.
Armageddon was too, just not to this degree.
As far as a movie is concerned, Armageddon was better. The graphics of the shuttle landing were very good actually. The lightning storm was fair. The other effects were rather poor by today's standards especially the GG bridge scenes. Any engineer will tell you that tires are thermoset thus they will not look like chocolate melting and sticking to the road!
Unobtainium? Come on! Someone has been reading too many BitBoys articles and sucking back on jolt colas spiked with some kind of organic solvent.
EDIT: The movie was quite grainy for some reason!
Cheers!