Scanning the manual it looks like the TC-PxxST60 has a lot more features than the ST50 that it replaced:
Has Pro Settings Menu in Custom and also in Cinema mode
Copy Settings function to copy your Custom or Cinema settings to another input or all inputs
Has a new Home Theater picture mode - "provides a soft film-like picture for watching movies in a dark room"
24p Direct In, with a 96Hz setting available for 1080p content via HDMI
1080p Pixel Direct - Enables 1080p 24/60 4:4:4 signal
Has HDMI/DVI RGB range Auto/Standard/Non-Standard adjustment (standard RGB 16-235 or non-compliance 0-255)
Overscan On/Off setting (looks like it replaces HDMI Size 1 and HDMI Size 2)
Has more stretch modes, and adds vertical size adjustment to the Just mode
Screen Display On/Off (useful when listening to sound without watching the screen - press any key and picture returns)
Screen Wipe (Scrolling Bar) doesn't mention being timed out after 15 minutes like before, pressing any key cancels itBuilt-In Wireless
Correction - the ST50 also had Built-In Wireless, i forgot to edit this line out when i copy/pasted S60 info - Thanks for the correction guys.
Do you see any other mistakes?