Are any experts predicting that the rate of technological advancement will slow down?

It seems like everyone these days is predicting that the world is about to get crazy; AI/the singularity, nanotech, super biotech (like drastically extended lifespans), biointegrated internet, supervision from either eye implants or augmented reality, mass cyber wars or cyber arms races, etc etc.

I'm just wondering where all the counterarguments are. There must be someone out there saying we've hit a wall and the world in 30 years will be pretty similar with just better cellphones and maybe self driving cars.