I think the largest change in the world will be the use of science, the developing of things such as genetic engineering and bacteria and making us much more known of the unknown, companies are already coming up with ideas of producing real meat, without the idea of killing animals? Could consider yourself a degan?
With science, as well they are already trying to produce own products such as automobile frames, that could be ‘woven’ from graphite and spider silk.
How will the world look in 2030?