Revit 2010 introduces:
New User Interface (ribbon) - which from my experience is a better implementation than most other platforms that have implemented the ribbon.
Conceptual Modelling tools - A complete redesign for the conceptual design modelling tools enabling nearly any form to now be modelled directly in Revit. You are no longer confined by blend, extrusion, sweep, revolve and swept blend. Instead simply draw the various components that would make the shape, select them and then hit create form/void... You still need to be aware of intersecting geometry as this will result in the "unable to create..." error that is typical in Revit. Furthermore with this tool you can apply complex patterns to them based on a UV breakup of the surface. And the very cool feature is this can all be controlled via the API to generate some amazing mathematically driven patterns for surfaces. Checkout Guy's blog for some examples shortly.
Performance Enhancements - 2010 ditches Open Gl for Direct 3D as well as being native x86/x64 with some minor multi-threading tasks now implemented (no longer two separate installs). Graphically 3D navigation is much faster that 2010 and should be a welcome addition for most offices. Also, anti-aliasing of 3D views means linework is going to be much smoother rather than stepped as well as being able to turn on gradient backgrounds for a little more effect to your perspective and orthogonal views.
Minor Drafting Tool inclusions - You can now control the underlay linetype on a system wide setting as well as halftones. Also a new tool called Spot Slope which can indicate the slope of a surface that its placed on (similar to a spot co-ordinate or spot elevation). Unfortunately it doesn't work with Ramps as they still require fixing... Be careful when tagging roof pitches in elevations to use your tab key as you may inadvertently tag the ridge line instead of the true perpendicular fall meaning you'll get a different value than expected.
Interoperability - Bi-directional communication with Civil 3D via the adsk format, the ability to import adsk files from Inventor for family creation (things like connectors are transferred as well as all the product information) - hopefully this will assist with some accurate content becoming available soon. Exporting to gbXML has also been improved with a full graphical review of the export and analysis now available prior to export to iron out any issues before hand.
- There are most likely going to be a number of bugs in the initial release so it may be worth waiting for WU1.
- No notable bug fixes.
- Not many drafting tool enhancements and no text enhancements.
- Great release for those doing landmark buildings, others may find the release light on features...