If you understand that in the beginning, it helps when you're in the thick of it. It's the concept of universal solutions. In other words, people think you can come up with one universal gadget or system or solution that solves a whole bunch of problems. That if you find the Holy Grail of solutions then everyone will flock to you. Everyone is wrong.
People are different.
They have different needs. They'll need different devices to satisfy those needs. I see a proliferation of gadgets, all of which interconnect. Some gadgets will combine, but more will be separate. There won't be a universal network, either.