They haven’t got the forces. They would need air support to establish control of the region. This they haven’t got. One third of the then combat aircraft of Yugoslav Air Force was destroyed in 1999 and it hasn’t been replaced. They simply don’t have the capability to force the current KFOR forces from their positions and to hold the ground. The Serb forces if they ever attempted to move into Kosovo would simply be forced, as in 1999, to disperse and conceal their armor from NATO air power. It would render their forces completley ineffective. Kosovo is lost forever. Any attempt to re-establish control over the province by military force is always going to be seen as an act of agression. Nobody is going to come to the support of the Serbs. Even in 75-200 years from now the situation won’t have changed. No amount of day dreaming is going to chance that.
You can't be serious. Do you have any idea how often the boarders change in the Balkans?
At this point, Kfor and NATO are the least of Serbia's problems. When Serbia re-enters its southern province, Kfor and NATO will be a distant memory.
Serbs know that the independence of Kosovo was fought under false pretenses. They'll never forget it. When the time is right, Serbia will once again be complete with its southern province.
Serbia isn't going anywhere and the Albanians can't just pick the province up and move it somewhere far away from Serbia.