They've been promising quantum computers for three decades with zilch results. I've lost count of how many times and how many startups and even major market players claimed to have working quantum computers, which of course to this day are all just smoke and mirrors.
They've been promising artificial intelligence for three decades with zilch results. Then they redefined what AI means to get venture capital pointing the money hose at it. Now people think a glorified autocomplete and grammar engine is 'artificial intelligence.'