I would say the boosters landing on drone ships and getting reused 8 times are pretty impressive. Also the Starship landing with the flip.
Self landing boosters is just the logical application of control algorithms. As with the "flip".
Super Heavy Boosters, on the other hand, are an interesting new way to solve a problem.
LOL. Reusable rockets left as an exercise for the reader.
It's the difference between iteration and bigger breakthroughs/shifts in technology.