Basically the ending sucked. If they wanted the tension to depend on what it means to be human after the singularity, they could NOT have done worse than a dumbass hollywood love thing.
On the other hand the producers could argue that if they took the concepts even higher than where the film already went, then they would've left even more of the audience behind---they had a monster cast in that movie (morgan freeman, paul bettany, depp etc) and a respectable budget and it barely even blipped.
Way more enjoyable than expected, though... just don't expect an ending that would escape Hollywood's gravity.