Right off hand for 2.0, I think the eyes/attention-monitoring camera, assisted lane change, ramp-to-ramp hands-free, and map-integration (for speed compensation going into curves/elevation/lane merge, etc) are all 2.0 features.
For 1.0, it's basically just a combination of range-finding dynamic cruise control combined with lane-keep assist. This is a fairly common implementation for alot of modern cars. I don't know but I'm guessing it requires hands to be on the wheel for torque feedback sensing. Not sure exatly though...
Details as follows:
vs ProPilot 2.0
Yah it looks like 1.0 is just a radar rangefinder combined with a front facing camera for lane control.
2.0 on the other hand has centimeter-accurate GPS, 7 cameras, 5 radars, and 12 sonar sensors. Assuming it's not failure prone, that should enable alot of magic. Keep in mind that ProPilot 2.0 in the Ariya is supposed to get other-the-air f/w updates as well. That is really important actually, if Tesla's experience is any indication.
Oops I just saw that the Ariya base package has ProPilot (1.0) but also includes the navi-link feature which adjusts speeds going into highway bends and merge points based on lookahead map data. So that's a bit better than what I mentioned earlier. Sorry I didn't check that before...