I think the dump and pump argument is more theoretical than real in a case like this. Pump and dump only works on short time horizons.
A bigger worry for me is stagnation. Suppose Google Docs gets 'good enough' and prices out all the competition, but then Google loses interest because it's not exciting anymore.
This happened with Internet Explorer. We lost years of advancement in browser technology because they dominated, wiped out the competition but then lost interest. Yes competitors came along again after a few years, but there was a significant opportunity cost to all of us.
A bigger worry for me is stagnation. Suppose Google Docs gets 'good enough' and prices out all the competition, but then Google loses interest because it's not exciting anymore.
This happened with Internet Explorer. We lost years of advancement in browser technology because they dominated, wiped out the competition but then lost interest. Yes competitors came along again after a few years, but there was a significant opportunity cost to all of us.