I have just returned from a two week trip to Egypt, staying for three nights last weekend in Cairo.
We did not experience any problems at all, apart from the dreadful Cairo traffic (which has to be seen to be believed!)
There seemed to be more police about but the only show of strength was outside the Egyptian Museum in Tahrir Square. The road in front of the museum was full of tanks, at least thirty, a number of police vehicles. There were three check point to navigate through before finally entering the museum.
The outside coffee area is not open anymore, but other than that, it seemed like business as usual.
We had a great visit, staying at the lovely Hotel Longchamps, which I had booked from recommendations on TA. It was excellent and next time I visit Cairo I will certainly stay there.