Um. I hate to be negative. The concept of amazon, apple, microsoft or google being dethroned by crypto alt products seems unlikely if not impossible.
Start with microsoft whose flagship product is windows operating system. Try to imagine a scenario where Windows 10 is made obsolete by an operating system based on blockchain. Its not a scenario which easily fits into the fabric of the space time continuum.
Try apple next. How likely are ipads, iphones, macs or other apple products to be replaced by hardware or software utilizing a blockchain? Eh. Probably. Never.
If you want a scenario where bitcoin or crypto might thrive, it might be better to look at the limitations of fiat money or banks as institutions--things that actually do compete with bitcoin/crypto for market share, if to an extremely limited degree.
I agree with you man. This is just impossible to happen because crypto currencies are not really having that much use as the real world products are having. The real market trends created by products and services that are actually existing and getting used by the people for day to day life. Now all the ventures that you have listed up there are the biggest in what they are doing. They have a business model which is now has become fail proof because of many reasons. One of the valid reason is, they are playing monopoly in the market and virtually forcing people to use their own products and services. This way they are keeping their customers attached forever.
I see no or zero engagement like this in the crypto currency market.