Being in the tech industry since the days of the original PC, I can tell you that the trade show series ending isn't a sign of a given industry's demise, but it could be a sign of its comoditization. Comdex started in 1979 and used to be the USA's biggest technology trade show, there was one in Atlanta and Vegas every year. Tony Bennet sang in the WordPerfect release auditorium and we resellers all got free Wordperfect umbrellas and NFR copies of every piece of software they made, woohoo! (Man, those were the days, when vendors romanced resellers, now with most software vendors I have to PAY for my own demo software and I have to PAY for the privilege of reselling their crap and I have to PAY for recertification exams to qualify to be allowed to sell their software. What a SHAM! They turned the reseller channel into a profit center !) At any rate, Comdex shows died in 2003. Are computers still popular?
What I feel it DOES mean when trade shows die is that the industry has become mature and commoditized... hence there is no longer the large profit margin for brick and mortar stores, so who do these shows have left to romance to carry their items on their shelves? Sure they used to let the general public into these events as well, but these were really events for resellers and influencers. Places like Amazon don't need to go to the trade show to see vendors and make relationships and see what computers and software it wants to hawk. Same thing happens to other industries as the way we consume changes.
Like any other product that becomes mature, I predict we will see some more consolidation, like the car industry, small startups get bought up, weak companies bought up for certain patents and client base, and melded into the current product lines or just plain shut down. Electric cars brought some new life and new players to the car market, and any time new tech comes it broadens the market, but the trend is to stabilize over time and the market can only support so many players once a product matures, then the market contracts. Digital breathed new life into photography markets for a good long while, mirrorless promised to be the next big new thing, but is just cannibalizing it's own market and not bringing in new buyers, and then there are cell phones... which are good enough for what used to be the Kodak Instamatic and Polaroid crowd, and I think all that adds up to a what you now see.
Well, that's my .02 FWIW,
Eric