Actually I think the bigger problem with what I said is that the huge one-trick companies I mentioned (all in mining/oil) are insensitive to competition. The ma

Actually I think the bigger problem with what I said is that the huge one-trick companies I mentioned (all in mining/oil) are insensitive to competition. The market can easily support a large number of mining/oil companies, all plugging away steadily on their own bits of dirt. Google, on the other hand, is the dominant search engine mostly because it's the best, and if anyone ever develops one that's significantly better then Google can have its lunch eaten quite quickly.