Very happy for the Dutch Royal Family; the (former) Queen was very proud of her son clearly. I hope she enjoys her retirement.
Would that Liz would follow suit.
Why are you so eager for King [Charles III/George VII]?
I'm a little eager. The British Royals have longevity on their side. When this happens (and it's not just a recent phenomena either) the Dutch solution keeps the monarchy moving. There is nothing to stop the current Queen reaching the same age as her mother. If she did, that would take her to 2027. Charles, if he's still living would be 79. Even William would be 45. You end up with a 'bottleneck' that means we could have a series of geriatric monarchs. In either event Charles would (and indeed now is) take on more and more responsibilities from his mother and towards the end of her life, take almost exclusive responsibility for the monarchy. However by the time he becomes King, William will have to almost immediately take on his responsibilities too.
Something has to come in to 'break' that. Victoria died at 81, Edward VII at 68 and George V at 71, all relatively old age's. It was the abdication and George VI's cancer that 'reset' things so that Elizabeth became a young monarch. If the Queen doesn't abdicate and she won't, then I suspect Charles may do so, after just a few years.