That being said, her chances at the nomination are pretty minuscule, no matter how many people were "impressed" by her in IA. She simply does not have enough appeal among the demographic groups required to win the nomination. There is a narrow band of support in the party that does like her a heck of a lot, but I have yet to see any evidence that this faction has any wider influence in the party.
I don't think she's going to win, but I do think a Ron Paul-esque ~4th place or so with a cult following is very possible. I do think there's a minority of the primary electorate who would be drawn to a candidate on the basis of them being maximally "anti-establishment", and if Sanders isn't running, then I'm not sure Warren would be seen as sufficiently "anti-establishment" for some of these folks.
She is a women and POC those are huge voting blocks in Democratic primary, she is on the same level of Kamala Harris in terms of 'history' she would make. She would also likely be the first millennial Presidential candidate ever.