I think the room for growth and market expansion (Important Electric Things and energy future) is very large. I think trying to compute how the math will get there is a mistake, short of making sure that they are not going to run out of money.
Being long technology stocks is a strange game. If you're long IBM or AAPL right now, you're more or less betting that the future is going to look pretty much the same. It's almost a misnomer to call them technology stocks.
There are only a handful of public companies you can bet on (Tesla and Amazon are probably the most obvious) that are really betting big on the future. The dividends of these will be unknown.
Think about it this way: If you did your same math, could you have expected or predicted Amazon's AWS success? If you want to bet on the future, you have to make sure the company isn't going bankrupt, then you have to look more to the processes that the company produces, moreso than the [current] products.