ESC, TCS and 4-disc brake are all useful

These are all useful. Somehow I got impression ESC(maybe other as well) is becoming standard feature as of 2012.

ESC(Electronic stability control):
http://en.wikipedia.org/wiki/Electronic_stability_control

TCS(Traction Control System):
http://en.wikipedia.org/wiki/Traction_control_system

Usually ESC and TCS features come together.

Disc brake is more powerful than drum and costs more. 4-disc brake has short stop distance comparing w/ front disc & real drum brake setup.

If you live in north, ESC and TCS definately make difference when you drive in snow, icy or slippery condition. The advantage is less if you live in south.