I'm not sure what we will be doing to celebrate, and I'm not even sure I feel the need to 'celebrate' personally. Yes, I will probably watch events on television if I'm home, but as for the street parties of 1977, or the nationwide silence of 1981 (as everyone watched the Royal Wedding on TV), I'm not sure it will happen.
We are a very much more sophisticated people than we perhaps were then, with greater horizons and expectations, and for all our renewed interest in the Royal family, I'm not sure the majority are that enthralled with them, other than a cursory, fleeting interest.
Maybe I will be proven wrong, maybe I won't be able to move for 4 day street parties, bunting, and rejoicing in the streets, but I'll be surprised. BBC1 and ITV1 will no doubt be smothered in it, but the people themselves? I'm not so sure.