Sling TV has just joined the (rather slim) ranks of live streaming TV services that offer 4K resolution, and it’s doing so without imposing any additional charges. Sling will kick off its 4K streaming with the 2024 MLB All-Star Game on Fox Sports tonight, while upcoming 4K sporting events include the 2024 Paris Olympics on NBCUniversal’s USA Network and professional football games on FS1 and ESPN. While Sling’s new 4K streaming capabilities won’t cost anything extra, there are some caveats, including the fact that Sling’s 4K support is (for now, anyway) limited to “supported” Amazon Fire TV an…