Streaming music in iTunes 11

So I installed iTunes 11 after updating to Windows 8 (let's just say I can't wait until I can afford a Mac), signed in with my Apple ID and suddenly all my purchases appeared in the library. I decided to double click on one of my songs with the faint hope it would stream the track. To my surprise it actually did and will do the same with movies. I can't begin to explain how useful this function is, I really can't. I thought this was a feature only available to iTunes Match subscribers but obviously not, as I don't subscribe to this.

Let me know your experiences of what I believe is the best feature of iTunes 11.