Motorola Atrix will be with locked bootloader, this is a confirmation that does not change the life of the average phone user, but to all those who like to use custom cooked ROM’s and personalize their phones, it’s really pain in the a**. Motorola Atrix was rooted some days ago, but that still does not allow you to install any custom Android ROM.
XDA Developers have successfully unlocked the bootloader of Droid X in the past, so probably soon we will see the same with Atrix.