Cold Calling or Cold Emailing...where are we now? What will be the future of sales?

I see a lot of threads about cold calling or Cold emailing, the thing is I engage most of the times in cold calling but from customer side from real estate developers or agents after I plug in my details just to listen how they try to engage me and sell me their product. However, many I know just hang up on them.

Now must of us are in B2B SaaS sales, in my job I rarely have the phone numbers of the persons I need to call so most of my job is cold emailing or cold linkedining.

How do you think our jobs will evolve in this new age?