I buy everything other than groceries from Amazon. Prime will continue to be money well spent.
I buy an awful lot from Amazon. It's a convenience thing - I press a button on my phone & it shows up on my doorstep a couple days later for the asking price. I am curious to see if that trend continues in the future...not that I own absolutely everything I want right now, but I've outfitted my kitchen pretty well over the years, have a pretty fun TV setup, some some smarthome stuff going on, etc. Beyond that, it's mostly just topping off supplies like TP & canned tuna.
I've tried doing online shopping for groceries with stuff like grocery delivery, but I kind of like picking out my own produce & wandering around to get ideas (even though I typically go in with a shopping list) & seeing the new stuff on the shelves. Like tonight, I got Kettlecorn Oreos (not bad!), one of the new flavors of Oreos that just came out. Unless it popped up on the grocery delivery website, I don't think I would have ordered it (or known about it) otherwise.
I do like the trunk-fill service, like Walmart has. Order your crap, drive up, they put it in, drive home. No lines, no waiting, no wandering around the store. I know Amazon is working on their trunk-delivery service as well. Curious to see how all of this plays out in a few years...