Very funny.
Honestly, we don't know at this point.
But I do see several possibilities:
1)
@Knightshade in the other thread thinks it is just FSD visualizations. So the sneak peak could just be FSD visualizations like traffic light and stop visualization on the screen. That would constitute a sneak peak without requiring releasing any actual FSD driving features that have not been properly validated yet. Most likely.
2) The sneak peak could just be 1 FSD feature like maybe Smart Park that was teased awhile back. But if they are just now sending it to EA, then it could be awhile before the rest of the fleet gets it. Somewhat less likely IMO.
3) Maybe Tesla is sending what they have so far in development of "feature complete" to early access so that we can see what Tesla has so far in FSD. This would probably include traffic light and stop sign response and some rudimentary turning at intersections. But this would probably require AP3. f this is true, then most of the fleet would not get this. So I think this theory is least likely IMO.
In any case, we should find out soon enough when it leaks from EA.