There's been a lot of innovation - no shortage, actually - but it doesn't seem to have caught on. I am thinking of virtual reality like the "Metavarse" to name one that was supposed to be revolutionary. Haven't heard much about it in a while, esp. given how much Facebook/Meta was jumping onto that bandwagon.
Virtual reality glasses and headsets still seem rather superfluous.
SmartHome devices - there have been quite a few becoming available, from refrigerators, security systems, doorbells, lighting, etc., but have the sales been anything significant?
And of course, some of these are more software and app based rather than the kind of hardware things you would see at Best Buy.