> Every major OS has Spotlight-like UI these days. You can thank iTunes for the search-as-filter paradigm.

I think your Apple bias is clouding your memory.

Apple certainly didn't invent the Spotlight UI. Quicksilver did it before on OS X, and my memory is hazy, but it also might've been inspired by another app.

iTunes also didn't invent the search-as-filter paradigm. I remember using something similar on foobar2000 in the early 2000s, and it might've been available even before in some Winamp plugins. Again, hazy memory, and it's difficult to track down these things now with any certainty.

I'm not arguing against your love for iTunes, but I think you're overstating its influence on software design.