Installed 40.50.1 this AM. Took it for a test drive and yes you get stop sign and streetlight display as well as garbage cans and more lines at intersection. What you don't get is anything really related to FSD. It doesn't stop at stop signs, it doesn't slow down approaching a stoplight, it doesn't yet turn the corner. It will brake for garbage cans if close to the road. No where close to FSD, but you do get some more games if that is your thing. I paid for FSD, not games!
We already knew this. This update is just the visualizations as a sneak preview of things to come. Traffic light response where the car will stop is currently in EA and will be released later. We will get the FSD features later.