Boring "Luxor has just about seen an end to anyone visiting" really, it certainly has stopped the flow at present, BUT, I am intrigued by your comment.
When the FCO advise it is safe for people to go to Luxor IMHO they will go (not in the numbers they once did granted). When the political situation improves, people will given time, want to experience this fascinating place again. The problem over the last couple of year was 1) the 2011 revolution, 2) the political uncertainty with the army and 3) the MB. Read this from the link below. I think this time it is different.
Luxor will survive, it will take time, but the tourists will come back eventually. As I said earlier, it is my intention to go back before the end of the year (come what may), I do honestly think the FCO will change their stance on Luxor, sooner rather than later, as there are demonstrations (but they are peaceful in the main).
Edited: 9:53 am, July 21, 2013