There’s several scaling solutions in the works (for both the main chain & off-chain), nearing completion, or recently implemented:

Sharding

Proof of Stake

Generalized State Channels

Plasma

Raiden

TrueBit

What many fail to understand:

Application devs will be building atop/integrating their scaling solution of choice.

There is no centralized ‘be all end all’ scaling solution.

It’s a Darwinian meritocracy of scaling solution options. As it should be.