the singularity is 20-30 years away. I truely doubt 20-30 years more worth of carbon damage will result in 1.8 miles of ice covering the earth. and the concept of living in vr, doesn't mean surviving in a bunker with some vr headset. he's talking about mind uploading where a person choose to upload their consciousness into a matrix like reality, abandoning their physical body which requires food, water and shelter.