That sky crane shot blows my mind. Knowing conceptually how sky crane works and that it does work autonomously is crazy but then seeing a picture makes it even more real.
It's been almost a full day now, I wonder why they don't have a nice big HD photo from the main camera.
Bootup / checkout for a rover takes longer than you might think. Day 1-3 are probably (I have no special information) verification activities and "commissioning". Some of that will involve taking images, yes, but it'll take time. Watch for them to say the mast is unstowed / operational. That has the images you've come to expect.