Having just returned from Cairo (20-23 Nov), Luxor (23-28 Nov), Hurghada (28-3 Dec), I can safely say that my wife and I had a great stay. Initial concerns over Tahrir were mitigated by avoiding the more volatile afternoon period for our visit. to the Egyptian museum. Demos & riots in a (very) large capital city are highly localised. Regardless the successfult start to the election process and reassuring overtones from the encumbent establishment has created a confident and positive mood. Hopefully the next government will continue to build a positive and mutally inclusive country. Inshallah as they say. If not....go now!!
If you want the incredible sites to yourself you must go now. Everywhere was empty. We stood at the Tutankhamen mask - alone. We sat on the floor of empty tombs in the vallies of the Nobles, Queens and Kings. It was such a privilege (unrepeatable?) to sit looking at over 3500 year old paintings and inscriptions on our own, alone save for a quiet, patient guardian happy that we were happy (and a small tip was on its way after a very quiet day). Karnak - I have photos of empty avenues; Danadara, there was no one. Sure it means local touts are desparate and you will have to smile and learn to say "la, shukran" - and ultimately "la, shukran. Halas"! But bear in mind that these people need tourists to survive. Spend a little at least.
Go and visit this amazing country. And now.