No spy planes did not die with the age of the 3 meter satelite resolution.
Satelites are great for getting the big picture, however the handful of super-awesome-mega-resolution satelites are constantly baing timeshared by almost all US agencies and the like.
When I was on my way out of Chairforce intel the baseline standard satelite resolution was about 9 feet (3 meters), now I hear that the new baseline is soon to be 6 feet (2 meters) with a a handful of super-awesome-mega-resolution satalites almost having a 2 foot margin now.
Soon they will get to under a foot which is nice because it can provide nice spiffy super high res (5+ Gigabyte) reconnisance images down to even counting the shingles on the roof of your house.
The only problem for this is that these satalites are the far minority in their fields and are constantly fought over by federal agencies and interdepartments due to their ovbious value.
Also when considering orbital satelites those have primetime windows of opportunity as they coast effortlessly over out heads about every 100 minutes or so which is usually the amount of time that it takes them to complete an orbit.
So there are times when big brother has to switch his glasses out to another pair as it rounds the bend over the horizon of the specified area.
So in short satelites are great for getting daily or even hourly updates on extremely high priority intel targets, however for continous survailence or more immediate options you turn to either drones, planes, and finally men.
Each one has a cost in both dectivity, time and risk.
With spyplanes usually the time to target time is very low due to their speed, however this speed also sometimes compromises their stealth if they are going to fly over a target with a even a 'semi-modern' radar defence/warning system, plus their potential lost cost is the highest.
Drones on the other hand usually have a moderate to long time until target depending on their deployment positions, however their small size and slowish speed usually make them stealthy enough to get to the target area mostly undetced and get a few minutes worth of constant survailence before they are noticed. They are moderately cheap and totally expendable. Most now carry a payload or are themselves a payload that can be used as an impromptu bomb if a good enough of atarget situation arises.
Men or more specifically recon specalists range from dedicated special forces recon units such as the USMC Force Recon to basic 1-2 man USAF Far Area Recon jump teams...they usually take the most time to get to a target, but potentially have the lowest risk of detection, however their cost is high, (more then the drone but less then the spyplane), because where as men are expendable experience is not.