With Sky Sport, you can watch up to 2 different sport programmes, simultaneously using the same account.
Example : You can watch the match A from one device and the match B from another device but not the match A from 2 different devices.
With Sky Show, you can watch 1 or 4 video streams at the same time on different devices, depending on the subscription you selected.
With Sky Store, you can watch 2 video streams at the same time on different devices.