[Zathras]

Atom's primary advantage is cost and low power.
Intel can build 4 Atom processors for 1 Core 2 Duo.
Power is less than 2W depending on the options.

[antiRepublicrat]

Atom's primary advantage is cost and low power.

It's primary advantage is that you can run Windows on it. ARM processors already give decent performance at low cost and power consumption.