If Google stopped operations right now, we would still need a decade to catch up with their current technologies, and they leave behind a massive patent minefield that won't help the situation.
The speed at which they push forward comes at a high price in my opinion. Their dominance and the fact a lot of end users as well as companies are basically fully dependent on them scares me.
Right now there are few (worthwhile) alternatives to their products and god knows what this will be like in 2020 if everyone keeps ignoring that.