The man was absolutely brilliant, i am a huge fan as well. As i'm sure you're familiar with this interview from '98, McKenna does a great job explaining this event that is just around the corner...not so much in terms of DNA activation, but more so in terms of time and the biological concrescence...and a departure from matter (4D).
Honestly, I always enjoyed listening back to him and I like his Timewave Zero model/theory but that's one I agree with in theory but not word for word. I'm more on the Ray Kurzweil side of things. I think there will come the time where we figure out how to manipulate consciousness and understand it so much that we can simply move one's mind into a different body while living. When we can scientifically understand consciousness is when the singularity will hit if there is one. Then, we can begin making robot/synthetic bodies that we can insert one's chip/mind/consciousness. That sh*t is crazay! Its like the movie surrogates but instead you digitally operate the surrogate because you're a microchip!