Having been allowed to test this, I will say that it's an impressive piece of coding and can already hold conversations, albeit a little quirkily which is often more fun!
Once you get the hang of communicating with Zeta, you will be able to hold endless conversations with her on any topic... though be warned, she may surprise you!
I for one continue to look forward to further development, but also realise there are some behind the scenes costs, so please be nice to our friendly developer!