Emma gets to a see a different side of Hook, the sentimental side.
Remember how Emma said to Hook at Lake Nostos after he saved Aurora’s heart: I had no idea you had such a soft side. And then he comes back with, ‘I don’t’. Emma’s going to see different facets of Hook next season, probably most notably Killian Jones, his true self. And being sentimental, compassionate even — that furthers Emma along to falling in love with him, Killian Jones.
Whereas, the person she loved before was Neal, the persona he adopted aka, not his true self (Baelfire).
Plus, I really believe, an important aspect of True Love is bringing out the best in the other person. Emma’s going to do that for Hook.