SQL Server 2014 is now at Service Pack 3, with plenty of enhancements back-ported from recent SQL Server 2016, 2017, and 2019 updates.
Jonathan Kehayias (@SQLPoolBoy) takes a closer look at a new trace flag that allows you to process multiple concurrent statistics updates on the same table.
Aaron Bertrand (@AaronBertrand) talks about new arguments to SERVERPROPERTY() that make @@VERSION even more obsolete (and changes that make @@VERSION problematic).
Glenn Berry (@GlennAlanBerry) provides some blueprints for how to decide whether newer processors are worth the investment to improve your OLTP workloads.
Updated April 17, 2015 : SQL Server 2014 Service Pack 1 has been released, but was quickly pulled. This post explains why and shows how to fix any affected instances.