You mean just store things as raw bitmaps?
I'd like to see existing compression schemes used properly. My png encoder will generally reduce the size of a given file by at least 30%, within 30 seconds. More time might remove another 5-10%, depending on deflate block count.
Simple heuristics to select apodization method during flac encoding can greatly reduce file size as well. It's been over a decade and arithmetic coded jpegs still aren't widely supported, despite long since being in the public domain. LZMA (eg 7zip) has been around for years, and can reduce certain types of data by 99%. Instead you'll usually see a sloppy DEFLATE run on this data.
It's a pathetic mess, like the rest of the "tech" world. Existing standards are entrenched, and adoption of new techniques is poor to nonexistent. FLIF is coming along for images, not sure about audio. Video is often constrained by realtime / hardware decoding and encoding considerations, and need for non-sequential playback.
I'm working on a general purpose compression algorithm, but even if it's as effectivce as I think it can be, I don't expect much mainstream response.