The drive it self is available in 2.5" and 1.8" sizes with 40 pin ATA interface and 50 pin interfaces respectively.
I think it is a boon to mobile users as power consumption drops dramatically with these drives. So does the noise generated by the normal hard drives. But why ATA, most notebooks nowadays come with SATA interfaces and perhaps may be even could be used as boot drive for servers. May be could give a boost to write ahead and binary logs, and for swap drives!
Here are the specifications according to Samsung site.