What I see as unlikely, is that Google will NOT be around in 20 years. As I see it, they have positioned themselves quite well to stay relative into the foreseeable future.
Sure. I guess the point I'm trying to make is that nothing is constant, and that at some point they will disappear - maybe it's 100 years. Maybe 500. Who knows. I personally believe as soon as 5-10 years as their brand has already reached that tipping point of trust, but I'm happy to be proven wrong.