Actually I disagree - Its true most DIP/through hole stuff will be gone in 10-15 years but SMD will be around for a good while longer. Most of the stores you can walk into will no longer sell parts BUT I believe mail order places will still exist, when I buy parts - for example resistors or diodes I always get them in packs of 100-200, I believe that the electronics industry will still produce packages that are usable by us.

I can see in the future a low cost Pick and place machine coming out along with a reflow soldering station.

But to say that all hobby electronics is going to die is hopefully absurd.