SPFx Web Part - No App Catalog

Hi,

I've been having a play with SPFx, and I'm starting to think that maybe I misunderstood some of the statements at the Tech Summit.

I've developed my React hello world web part, and it's showing all my changes on my workbench. I'm now looking at deployment options, and I can only find documentation re. deployment to a tenant wide App Catalog.

Did I hear at the Summit that you could deploy these web parts at Tenant and site level, and Site collection level was on the way, or did I confuse some other message here? 

Do we always have to package customizations as an app and globally deploy them to  an app store?

Have we lost the decentralized nature of having teams empowered to deploy their own customizations to their own Sites/Site  Collections without the interference of Global Admins?

Looking forward to hearing from the more seasoned "SP Frameworkers" out there.

Thanks in advance for your help.

Cheers,

JC