In SQL Server 2016 SP1 features that used to only be available in the enterprise-edition are also available in the other editions, even in the express-edition!
Think of features as datacompression, partitioning and ‘always-encrypted’.
Unfortunately online indexrebuilds will still be an enterprise-only feature. Nevertheless the new features in the non-enterprise-editions can save companies a lot of money!
Be careful when you remove SP1 without thorough research when you are using the new extra features, this may lead to serious problems and corruption.