At the moment nothing has been offically announced for the Vive 2. Plenty of reported specs and unconfirmed info out there.
What I would say is if there is a VR game you really want to play then it's a good time to get one. If you can wait, I would.
The Vive came out in April 2016. A 2 year refresh might make sense. So we could see something by this time next year.