Vudu has updated tvOS app with 4K support, which as Engadget points out now provides Apple TV users with an option to watch Disney movies in 4K — albeit at with a higher price tag. Disney has been the lone holdout among major studios in getting on board with selling 4K movies on the iTunes Store, which is believed to be due to Apple’s insistence on offering 4K and 1080p titles for the same prices; Disney charges a premium for 4K content on…