Me again:

The new Google Quick Search Box (QSB) for Mac is designed to make things easier.

Summon it with a quick key combination and you can use it to find and launch applications, track down elusive files, dig up contacts or search the web.

It sounds very familiar, with good reason: apps such as Quicksilver have been doing much the same for years. So is QSB a Quicksilver killer? The short answer is probably – but not quite yet.