You guys should mark your posts as spoilers and make the text white in color so that it doesn't spoil it for the people who haven't seen it.
**SPOILER**
I think that he's not in a dream in the end cos the totem started wobbling, which means it would fall down. Remember in the previous scenes, he spins the totem in the safe, but it's constantly spinning. Also, his kids do turn back to look at him. I think it's all OK.