Whilst watching the Olympic marathon I wondered about the length, so I asked Google what 26 miles is in kilometres, knowing it’d give me an instant conversion. A pleasant surprise was that Google figured I was probably watching the marathon given the timing of my query and also showed me the live results, as you can see from this screenshot.
Occasionally I see articles pop up from people (mostly copyright holders) whining about this kind of use of information by Google. The fact is, it’s incredibly useful to the user. These kind of intelligent results show exactly why Google commands such a massive dominance in the search market.