I attended several break outs that focused on virtualizing business critical applications, such as Microsoft SQL Server. One demo showed the use of a second or standby VM for patches and upgrades. The demo can be seen here-
All of the presenters in the breakouts made plenty of time to answer questions during and after their presentations. It was great to ask questions from one of the actual developers of an area or product.
The hands on labs were another great area to see and learn new technologies!
For anyone else who was able to attend PEX this year, let me know your thoughts.