Pretending you have a working technology when you don't has been a recent theme in the startup world.
In the rest of the world, for example at the offices of Con Edison, or in the city of Edison, New Jersey, he's still considered to be somewhat important.
There's a billion and one things one could mention about Tesla. Sadly, only the tiny universe of people who dislike Edison (and see him as a businessman, not an inventor) are aware of Tesla's contributions.
Perhaps not controversial in the perspective of modern venture-backed startups, but at the time it was a key reason GE won early market share on so many products.
https://en.wikipedia.org/wiki/Vaporware
"Vaporware first implied intentional fraud when it was applied to the Ovation office suite in 1983; the suite's demonstration was well received by the press, but the product was later revealed to have never existed."