Hmm, it depends, DS is due to start school in September, he can do most of those, but we had a long load of issues potty training (although started at 2.5 yo), and he has still the occasional accident if not reminded to go to the loo regularly and can't wipe himself properly yet. At nursery and at home, he's reminded to go to the loo regularly to avoid accidents and he's cleaned. We're working on teaching him to wipe himself and are pretty sure he'll be able to do that before September.
However, he's one of the oldest of the year, there will be summer born children starting in september who are younger than he is now, I don't feel he's behind particularly, but then I can be more relaxed as he has the best part of a year more than other DCs to get up to speed on these things.
I also think some parents don't help their DCs, I've heard several mums going on about the virtues of old fashioned, buckled shoes or laced shoes, but their DCs therefore can't just put their shoes on by themselves, whereas velcro shoes are easy for a 4 year old to do.