Sling TV's new plan lets you stream to 3 devices at the same time

Sling TV, the Internet-based live television service, has introduced a new multi-stream plan that allows subscribers to stream to up to three devices simultaneously. The new plan is very similar to the single-streaming plan, but has a limited set of restrictions on certain channels, such as ESPN and ESPN 2, the kids' extras like Disney XD and Boomerang, a bunch …