I doubt "AI" will take the vast majority of IT jobs. The more likely candidate is the cloud providers all these IT leaders are jumping into bed with. Combine new entrants not learning anything about how basic compute/network/storage function outside of the cloud, with vendors pushing SaaS. PaaS and serverless. That's a recipe for becoming totally helpless without your cloud provider. I predict that most "IT departments" will end up just calling in support tickets if nobody can be bothered to learn how things operate.
As for the others:
"They predict that most organisations will have significantly reduced investment in property as remote working becomes the norm (22%)"
Not sure about this one. People have short memories, and most large companies have way more middle managers than actual employees. They will be beating the drum hard to get people back to the Agile collaboration fantasy chocolate factory. I'm guessing most companies will say, "Well, that was a nice pandemic. Back to work everyone! Innovate! Deliver at speed! Move fast and break things!" I do think cities with large commercial real estate bubbles (SF, NYC, London, etc.) are in for a major transformation. Companies will move their collaboration zones to suburbs in Texas, Florida, North Carolina, etc. because the vast majority of people don't care where they work, and city attractiveness was the last thing holding them back.
"(24%) of IT leaders polled also claimed that by 2030, data access will be tied to biometric or DNA data,"
This is just proof that "IT leaders" aren't technology people. Facial recognition, fingerprints, etc. all can be beaten by people motivated enough to do so...it just raises the bar.
"Nationwide 5G will have entirely transformed network and security infrastructure (21%),"
Wait till Verizon buys AT&T and T-Mobile. Nationwide 5G, for only $1.95/GB! The only way mobile carriers will be viable is if rates can be kept down below the cost of a dedicated network connection and service is truly universal.
"and security will be self-managing and automated using AI (15%)."
Doubtful. Security is still a human thing. Systems can put smart defaults in place, but developers still love dumping the customer database onto open cloud storage "just this once, for a test".