https://techcrunch.com/2017/09/14/googles-pixel-2-is-launching-on-october-4/

Google is launching the successor to its Pixel smartphone on October 4, as confirmed by a new advertising campaign and official landing page citing the date, and suggesting that anyone who is “thinking about changing phones” tune in for more information coming on October 4.

The landing page asks for an email address to be alerted with updates, and this same date and a tagline about asking “more of your phone” which appeared on a billboard in Boston this week (via MobileSyrup). Previous reports had pegged the date for a Pixel successor unveiling at or around October 5, too, so this is in keeping with that.