I used Wirecast 5 on my show this past Friday. I few things I noticed about the beat so far.

1. CPU spikes. During the show the CPU would spike about 20% for maybe 10 seconds at the most.

2. Live/Preview swap. This is a great feature of 5 which does a program/preview swap.

3. Video play back. I played a video recorded at 720p on my smart phone, Wirecast played it at full frames and didnt lag.

4. M4V video format. I have had an issue with M4V files in my video editor that came from Wirecast 5.

If you have had a chance to play with the beta let me know what you think!