Why are we cramming 21st century technology into a socket designed by Edison?

LED lights, mass produced as tiny individual diodes, can be configured into any shape you can imagine. In the future, they and their successors could cover large flat (or curved, or whatever) surfaces, mimicking the light that comes through windows and skylights. They can be used to create diffuse or concentrated illumination, in a radiant or beam configuration. Edison's bulb had to be roughly spherical in order to contain a vacuum while withstanding atmospheric pressure. And people were used to gas lamps, whose fixtures can be repurposed for electric lights. Because of this, a hundred years later, we have to cram LEDs into something that requires space-age fins to keep it from overheating?