> This technology has been around for a year but we only got a few samples. I'm very excited. I use TTS to read back all the text I consume on PC.

Nope! These two papers are fresh work on prosody modeling. You can see the evolution of work this team has been publishing about here:

https://google.github.io/tacotron/

> This web demo allows you to enter your own text:

That web demo is unrelated to this. It's about a Google Cloud TTS API, which only includes WaveNet, not Tacotron.

https://cloudplatform.googleblog.com/2018/03/introducing-Clo...