(Standard disclaimer: my opinions, not my employer's. Not representing anybody else. I work at Google, not on these projects.)

Most googlers who are also engineers can find out what most of these things are, and I would expect many are already aware of what those projects are likely to be. It is a core part of our culture that we share information openly within engineering, and don't leak it.

We can't tell you what's happening. That doesn't mean we don't know.