> It’s extremely difficult to project forward 10 years in tech.
I think this is a common misconception. Tech giants rise mostly because they create new markets. Since their beginnings nobody beat Microsoft on operating systems, nobody beat Google in search, nobody beat Facebook on social network market share.
The point would be that once you're dominant in a market it's very hard to be moved away and it takes more than a decade. I find it hard to believe a 1T dollar company can be outcompeted during less than a few decades.
Also as the tech/online market matures things naturally tend to slow down.