Purchased content can be viewed instantly while it is being downloaded over Wi-Fi. Using the cloud, any purchased shows or movies can be viewed on up to 5 devices and can be viewed an unlimited number of times until the expiration date. Once you decide to participate in the beta test, Samsung will send you a $25 gift certificate that you can use toward purchasing movies or television shows on the Media Hub. After the testing is over, you will receive a survey to fill out which will let the Korean based manufacturer know of any problems with the software.
To sign up for the Samsung Media Hub beta, click on this link.
source: Samsung via AndroidGuys