If a space faring society has access to such resources, and technological capabilities that they are able to make alloys strong enough to build large, armored space vessels, extract gas from a gas giant, and build kilometer long war vessels, what are the implications of their technical capabilities?

For example, anti-gravity is usually (In fiction.) Used for levitation, or unconventional thrusters, but it could also be used to *slow down time.*

What are the implications of a meta-material steel, outside of *build bigger.* Or being able to use the vast quantities of gas in a gas giant? 

An example, to clarify, would be oil. The most *obvious use* is a fuel source, but it can also be used for plastic. Or having so much gold and silver, copper isn't used in electronics any more.

The non-obvious things, that a society would use it for, but isn't as obvious from a writers perspective.

(Question re-written, to be actually useful. Used to a question about Stellaris materials.)