And he's going to keep saying it to tell investors why they should believe Google will eventually catch up in product until Google does catch up in product and he doesn't need to say it anymore.

Or until Google gives up on the space, or he isn't CEO, if either of those come first, which I wouldn't rule out.

Sundar announced his intentions to lead Google as an "AI first" company in May 2017: https://blog.google/technology/ai/making-ai-work-for-everyon...