Which security devices and peripherals to analyse in 2019?

Hi,

I’m doing a thesis in the future and I’m thinking about possible newly introduced devices and peripherals which I could analyse, find vulnerabilities and develop threat models. What are some that you would recommend at this time? What do you think of IoT? I’ve been stuck for a while when it came to deciding which to pursue and I’ll be stuck on it for a least a year so any recommendations would be great!

Regards.