Example:

To the local network, streaming to your device will very likely be a consistent experience. No signal dropouts etc.

But if you're on your phone and on a train/bus etc, you're going to get frequent drops of your signal. So, whilst song one is playing, download song two instead of waiting for song one to finish and THEN downloading it. Then, when song one has finished, play song two from the filesystem.

It's one of the methods of overcoming the spotty coverage I get in my area (and I'm sure many others have this issue).

But that was just one feature example, given as an idea similar to what people should suggest and shouldn't be read too much into.

Sorry my wording is a bit off, in work at the moment.