EVGA will deliver its future motherboards with a USB stick with drivers. The stick replaces the usual driver CD, which many new computers can not read anymore and therefore loses its usefulness.
Using a USB stick for supplying drivers is a logical step. Fewer and fewer users equip their computers with optical disk drives, which means they do not have much to offer with a supplied CD or DVD with drivers and often have to download them from the internet.
The reason that many manufacturers are currently supplying driver CDs instead of USB -sticks, probably has to do with the price. A DVD costs about 5 cents each, while a USB stick with a capacity of 8GB costs about 50 cents to one euro for the manufacturer.