There's already a number of solutions implemented, Segwit is an example. There's 3mb for witnesses in every block but they barely get used. Partly because noone really uses segwit adresses yet, which is a shame.

There's also plans to make a "Lightning network", which would greatly reduce the fees on small purchases and and would be great for companies like steam..

See https://www.youtube.com/watch?v=rrr_zPmEiME for a good explanation about it.