BIP-0119 is very interesting and may offer some new features to Bitcoin which will make many things better, from smart contracts to Lightning Network.
You can read the BIP for more information.
I am, however, wondering about some of the possible downsides to this - and worry that this may not be a slam-dunk upgrade. If you read the Design Tradeoffs and Risks section of the BIP, it seems there are some challenges with templates. Even so, perhaps the benefits are worth it.
I'm definitely going to be looking into this more.