I currently have a sony xbr55x850c tv and have been using a Comcast 4 k box and a roku 4 as well as a sont soundbar that I got when I purchased the tv in December of 2015. I want to step up the home theater and upgrade to an apple tv 4k as well as a new ultra hd blu-ray player and early next year I want to upgrade to a dolby atmos sound bar possibly the Samsung q90r. My question is should I upgrade my tv? Is the tv good enough to handle all of these upgrades well or will I not be getting the best quality that I could be getting with this four year old tv? And comments would be greatly appreciated.