One of the glaring things you will notice when you open up the new Revit 2013 as it will be known as through the Building Design Suite (BDS), is the additional TABS on the Ribbon.
Within the BDS, you now have full functionality of Architecture, Structure and MEP. Working in a multi-disciplinary organisation, this will prove to be invaluable, as you’ll no longer have to create an in-place family for structural members if working in Revit MEP, as well as other cross discipline functionality limitations.
The really useful part with this as well, is the fact you turn off the tabs you do not want to use.
This can be done at the stage of deployment, where a modification to the .ini file can be imposed on all installations, specifying which disciplines are required. This can also be done at a local level, by selecting from the options dialogue, to cater for each individual user requirements.