Resolution matters, but when are the biggest problems of today's fullframe cameras stacked, it will go like this: 0. Sensor's current electronic cleaning from dust doesn't actually remove dust, 1. Most don't have global shutter, 2. They got too small screens, 3. No automatic electronic ND, 4. No removable IR+UV filter, 5. Most without 8K recording, 6. Overheating in summer, 7. Battery doesn't last long for Pro's. 8. 5G inside, 9. Automatic/Manual lens distortion correction of unsupported and manual lens using printed chart (like to get laowa fisheye 4mm straightened).
While 200-megapixel smartphone cameras have been available for some time and are also found in the new Samsung Galaxy S25 Ultra, full-frame cameras currently offer a maximum resolution of just 61MP. With a new 410MP sensor, Canon now illustrates that higher resolutions are already feasible today.