Yes you can also jailbreak and do whatever, but the point is that is not easy nor official.

I am looking forward to an alternative store where I can install apps that Apple cannot control. Many big and small developers will be running to publish their apps there just to stop paying Apple the big 30% cut or even the $100/year to publish free apps.

We can get things like a BitTorrent client, a decent YouTube client without ads and background playback, better pricing for other stuff, who knows what else.