It will take more space, and pictures very zoomed in will look pixelated and noisy. Phones and modern digital cameras do a lot of heavy processing on pictures to make them more attractive. They all do it, heck our brain does it too in everyday life, what we see is not what hits our retina. There’s no such thing as pure photography, even during the film era there was a lot of alteration that came with the choice of film and other camera settings. Ignore the Luddite purists, even the most advanced professional cameras do a lot of post-processing even if they do finally save the image to RAW. If the picture looks nice, then it looks nice. The Pixel got creative to fill in pixels it doesn’t have to make the picture nice, any other camera would have crapped out and given you a blurry and muddy mess.