OK, this one is snarky and simplistic. But over the years I've heard about so many tech trends that are "the next big thing" for so long. The latest is VR, which has been "the future of technology" for nearly all of the 15 years I've been active in computer science research.
So how about a Twitter account that quotes tweets about the "next big thing" and adds a citation of the first known time it got that moniker. #throwsomecoldwateronit
(This is inspired by a paper about a similar phenomenon in ubiquitous computing.)