I'm excited to see the future of Sql server management studio with release of SQL Management Studio 2015 Preview. http://bit.ly/1LSu0Ek

Two of the points made on the website look very promising:

New SSMS Installer - SSMS can now be installed with a light weight stand-alone web installer.

SSMS Updates - Receive notification within SSMS when new updates are available, and choose to install them at your convenience.

I've tried a lot of alternatives to SSMS, the best so far being Devart's SQL Studio, however, at this time I still refer back to SSMS for the majority of my work. The fact it's been so behind Visual studio in basic features has always been a bit frustrating, so maybe this is a sign of an improvement in the future.