This, solves the transaction malleability problem and allows them to implement Lightning Network, wich will create an over blockchain layer that can abstract each coin specs, making possible transactions between BTC and LTC without needing to convert the coins.
Bottomline: this could bring big value to Litecoin, if implemented.
Here is Charlie Lee perspective on this, from January 6th:
https://segwit.org/my-vision-for-segwit-and-lightning-networks-on-litecoin-and-bitcoin-cf95a7ab656b
There are a lot of other coins that have segwit enabled, but few people know about them, such as Vertcoin. I think even NAUT got segwit. These coins don't have mining drama because they are small projects so they were able to easily get it activated unlike the bigger coins.
Litecoin was interesting when Bitcoin didn't have segwit, now that Bitcoin has segwit, it's no longer as interesting.
The article was about atomic cross chain transactions, so Bitcoin could scale thanks to Litecoin with LN.
Now, im no longer sure if Litecoin plays a major role, maybe once the next controversial update arrives, Litecoin will pump again.
My bad not to check if other coins had Segwit.
In any cases one would suppose that if LN gets implemented on Bitcoin, other coins will follow in order the allow this awesome feature that is to be able to transact in differente coins without having to convert them and pay fees.