Not sure about the "copy another developer's work" one... That one is something I recognize a lot as in patents.
For this, there will be only one Flashlight app because all others copied the first one. There will be only one poker app because all others copied the first one.
A personal example; Mega Jump (a popular game) will be deleted because of the less popular and very simple Papi Jump (because they're both jumping games). (Or Papi Jump gets removed, idk, not sure which one came first...)
Etc...
Not good for competition, if you ask me. It's all up to how Apple interprets that rule...
I'm pretty sure they will use it only cases of direct copying. So any kind of infinite platform jumping games are fine, but if another developer came out with something like SuperMegaJump and ripped some art from the original game than they will enforce that.
The Android Market has many unofficial copycats of iOS games, many using the original resources from them.