When your TV isn’t on, it’s sort of an ugly piece of decor. You can change that with Dreamscreens, the clever USB plug-in that turns your TV into a digital art gallery when it’s not in use. DreamScreens contains more than 500 of the most iconic paintings in history in a slideshow that you can activate by simply plugging into your TV. All of the paintings are displayed in 4K ultra-high definition. You can choose to play a slideshow of the paintings, display one painting at a time, or play a loop as a video with background music. Either way, it’s a classic upgrade over the big black empty pace w…