Hopefully we'll some of the new voice options you can use with their Polly service. I'm somewhat partial to Naja and Dóra myself. They only provide 10 voice samples on the main Polly page, but it looks like devs actually have access to 46 voice IDs.
The game stuff is kind of interesting but probably still way too early to be more than a novelty IMO. I think I linked to an interactive mystery adventure game upthread, which was OK.
Would be kind of cool to see console/PC games start taking advantage existing AIs like Alexa. I wonder what that would look like.