There are still waves going on now, and there are probably some startups being founded right now that will get rich off of them. It's just that the waves probably aren't what VCs think they are.
Amazon is putting large ads on the amazon.com homepage for it's products. I don't think if a startup had build exactly the same product they would have been succesful.
Apple had Steve Jobs, who had both a great vision and a cult of personality that made people buy apple products. Apple didn't have another major successful new product since Steve passed.
Google doesn't really have that many successful hardware products, except maybe Chromecast (which benefits integrations with youtube, chrome, etc.), Pixel (which benefited from good timing, the biggest competitor had to recall their flagship phone) and Home (which has less market share than alexa and benefits from Google's NLP technogloy).
Is it even available anywhere outside the U.S.?
Bringing a hardware product to market costs a minimum of $7m in the US. At Seed/Series A, this is a huge amount of money for investors to swallow.
https://news.ycombinator.com/item?id=14717976
Our first Pavlok took about 2 years, and probably just over $1MM in total costs---but we presold units to cover the float.
It doesn't mean that they don't fail tho.