I wonder whether eBay will beat Amazon in this category as the types of photos they have access to (amateur/home vs. professional/stock) are very different. Either way, I am not confident that taking a picture is a better solution than just typing in the name for the vast majority of items.
I call this the Minority Report effect. When an idea seems cool but in practice is much less usable and practical. And tries to solve a problem that never existed. Do I want to wave my hands in the air to control an interface or rest them on a table? Obviously the latter. It's worked very well for decades.
It's a great solution for "I want another one like this one but searching for it returns 10000 different items"
Looking around my house, I only see a few items that don't have unique identifiers like furniture or plates/utensils. However, I suspect the majority of things sold through Amazon/eBay are more likely to be video games, books, toys, etc. with very visible and highly unique names.
Image search could be useful if you want to find all the listings for a specific Chinese product and compare prices or revisions.