In future the technologies won't be independent. They will be interdependent on various technologies for their operations. And these all technologies are equally important.
Just a simple example of interdependency, Assume the Sensors for IoT placed on machines and sensing various parameters and transferring them to the gateway, the gateway transfers the huge volumes of day to day data to the CLOUD.
In the cloud tons of data will be processed and DATA Analysis will be done (Data Science is involved) . Data scientists will try to find more useful info from these data and use for the business decisions, operations etc.
So all technologies are good and have good scope, just need the right interest and passion to pursue that. Best of luck. I hope I was able to answer simple way.