Meet Sling TV, an Internet-driven endeavor from DISH Network that is the first legitimate alternative to traditional cable TV. It’s a service that’s free of contracts and friendly of pricing, and it offers tantalizing flexibility to the tech-savvy user. The service needs some work before it’s ready to captivate the average user, but with evolution, it has the potential to be special. The service is currently available on a handful of devices, including Amazon’s streaming devices, iPads and iPhones, Android phones and PCs and Macs. In the coming months (and Sling’s been working quickly), it will hit the Xbox One...