Last night was the 2nd time we've seen Eloise in a different Reality and knowing what was going on. Just like the 1st time (Flashes before your eyes) she breaks the 3rd wall with Desmond and tells him that what he is doing is wrong, and ironically enough what he's doing is choosing Penny instead of being content with the reality around him.
The fact that Eloise seems to know what is going on in every Reality or Timeline (whichever you want to call it) makes think. It seems to me that her conscience doesn't seem to be affected by different realities. Like she has a collective conscience that is fully aware of what is going on in every reality and knows the cause of them.
You guys think I'm on the right track here? Also, do you think that she is what Desmond has the potential to be if he embraces his ability?