Ah I see. Yeah looks like it's pretty much just RCS for cars. Space landing systems are pretty well understood from the rocketry side afaik. The hard parts seem to really be around autonomous landing site selection [1][2] in novel environments. We'll have to see if the Roadster can do significant in-flight landing manoeuvrers.
[1] https://en.wikipedia.org/wiki/IM-1#Lunar_landing [2] https://en.wikipedia.org/wiki/Hakuto-R_Mission_1#Landing_att...