I think that there is a niche for platform-provided guides like on Steam. They'd probably not be user-created on consoles tho because of a potential liability for what 69_gamer_420 wrote, but either game studios themselves or existing 3rd parties could've created a web app to serve their guides in the overlay or integrate these into the game itself (prerecorded ghost-players?). If it could have been put as a standard accessibility feature by Microsoft, I could see it happening. And I find it more probable than a genuinely helpful chatbot because of too many dependencies on context in each and every game. I've already got unasked advices on a few games that boiled down to using mechanics not present in exact games I was googling about.