[CM30]

I suspect part of it is because movies and other forms of media are more likely to be 'shared' experiences than consumer electronics are. Like okay, some systems are probably popular enough with the population that this sort of review setup could work well (iPhones/iPads/Apple devices, video game consoles*, high end Android devices, maybe certain leaders in their market niches), but a lot of the time the market would be spread too thin to provide a reliable set of reviews for every product. Like, how many toasters exist on Amazon right now? Apparently about 740 from a quick check.

Add that to however many other brands and models aren't listed there, and I'm not sure you'd find enough reviews to make such a site worth it. Especially not professional ones, since even the likes of Which don't review every single device ever released.

It might also be surprisingly hard to find said products in such a database if it existed too, since often only the model number is slightly different, with the core name being identical across variations. So I suspect it'd be significantly more challenging for users to use than Metacritic or Rotten Tomatoes, where looking up something like 'James Bond' or 'Star Wars' or 'Marvel Cinematic Universe' will get a bunch of easy to understand results.