From Seeds to Trees, from Kim Zussman
It must be difficult to model the growth of seeds into trees when the seeds of future trees are now barely visible.
Go back 10-20 years before each development, and estimate the economic impact of what ultimately became the automobile, radio, telephone, nuclear weapons, television, personal computer, internet, etc.
There are a few things happening now which will change the world, and several companies which will be the next Microsoft. Spin the wheel, pay the man, take your chances.