What if blockchain technology only really has it's uses purely as a cryptocurrency ledger?

Why games on blockchain? - it's been working perfectly fine for the last 10 years. I see no need use blockchain.
No need to reinvent the wheel.

The same for social media. No need. Censorship? Maybe - but archiving and storing on your own hard drive covers that...again...need.

What else needs an immutable ledger, except currency transfers?

I have a sneaky feeling this 'block chain revolution' is showing itself to be a rather empty one, in regards to anything except pure crypto currency usage.

'The jobs' are already being done quite nicely, from how I see it....

.....which throws a bit of spanner spanner in the works, about this whole ecosystem, and the utopian predictions of a 'new economies'

Supply and demand will change - as far as the mechanics go - but the principals remain the same.

Using price as the discovery mechanism of value, it is the only true measure in a free market - which I'm not saying this is at all - far from it - but it always reverts to finding fair value - sooner or later.

That being the case, (and the alt coins still dead in the water) - it would suggest that my hypothesis may be closer to reality, than the future you seem to continually predict.

(I hope I'm wrong, btw).