False dichotomy much?
In addition...
Brain power is not a fungible resource. You cannot divert excess brain power to any task you choose. It's a highly specific, highly targeted resource which seems to me to be horribly capricious and (ironically?) irrational in its choice of target.
In other words, the answer for any app entrepreneur when asked "Why didn't you work on a cure for cancer?" is simply "Well, I didn't think of that. I thought of an app."
I like the apparent contradiction in the Telegraph article too:
"Hackers/entrepreneurs used to invent revolutionary things like the PC!"
"People are only using personal computing devices for trivialities!"
Either personal computing was a great idea or it's a platform for the trivial and banal, you can't have it both ways.