Keyboard shortcuts for tools (hit ???z??? for the zoom function)
Better mouse roller wheel support
Better context menus
Customize Map Scale list (1??? to 200???, etc)
Limit Zoom to full extent (stops you from zooming out to the whole world rather than your focus area)
Right click and identify any feature
Sort the identify results (or hide fields you don???t want to see)
Copy and paste right out of identify window
Hide fields in tables very easily (just double click on them)
Print attribute tables!
Right click and calculate areas or length (no more vb code).
Table navigation mimics Microsoft Excel (word wrapping also)
Help now includes video tutorials
Supports CAD documents symbology
No longer need to set domains in geodatabases or grid size
You can set by default ???relative path??? in your map documents rather than have to manually change it every time
All ArcToolbox tools support batch operations (right click and hit batch)
File Geodatabase improves performance over Personal Geodatabase (much, much faster)
Flicker capability (rapidly turn layers on and off to toggle back and forth between datasets)
Export to PDF now includes named layers (layers tab in Acrobat can now turn on and off the layers right inside the PDF)
Native support of Excel (add Excel spreadsheets can be added right to the layers list of ArcMap)
Support for archiving (see changes to geodatabase over time and even use the new animation tools and save movies out to show change over time)
New graph support (Much easier to make “Excel Quality” graphs from inside ArcMap)
OH I heard mention of using an Python script and R within your ArcGIS Model
I’ll be honest, I haven’t heard the kind of cheering and clapping that I’ve heard today in a very long time