This premium TV features a detailed image, strong contrast and clear motion. Increased depth and AI-powered 4K upscaling all work to bring clarity to your content. ¹S90D 48" and 42" have OLED HDR. ²144Hz requires compatible content connection from compatible PCs. Motion Xcelerator 144Hz is sometimes called Motion Xcelerator Turbo+. ³Utilizes AI-based formulas. ?Samsung Account required for network-based smart services, including streaming apps and other smart features. Separate [connected] computer, mobile or other device may be necessary to create/log in to Samsung Account (free to download and create). Without Account log in, only external device connections (e.g., via HDMI) and terrestrial/over-the-air TV (only for TVs with tuners) available. ?High speed internet connection, additional gaming service subscriptions and compatible controller required. Samsung Account required for network-based smart services, including streaming apps and other smart features. Separate [connected] computer, mobile or other device may be necessary to create/log in to Samsung Account (free to download and create). Without Account log in, only external device connections (e.g., via HDMI) and terrestrial/over-the-air TV (only for TVs with tuners) available.