The thing is all those things will eventually migrate to the web. Right now the web has so much potential and those pieces of software have a small market and that market is pretty saturated.
Once we do everything we can do with the web then we will move into domains that have incumbents
I would say Facebook is much more useful to society then Audio Production.
I don't share the excitement about bringing this bullshit to apps. Maybe the web will improve: as websites become more sophisticated, customers will increase their expectations and start demanding better treatment. But this would require reversing the current trend.
That's a bizarre value judgment to make, but social apps have different technical needs from multimedia apps:
Bandwidth to the cloud will never beat bandwidth to the local disk. And RAM.