Nice but dim
The photos are good, but the biggest problem I have with my phone is the total inability to see the preview screen when outdoors and therefore to frame the shot.
Sure, you can stand there with the phone in one hand and use the other as a sun-shield, hoping you can press the photo button with your thumb whilst neither shaking the camera nor dropping it. Better would be a low tech solution: simply for the camera makers to drill a hole right through the phone's case: front to back that a photographer could peer through, just like "old fashioned" viewfinders. However the ultimate, which I'm still waiting for, would be a screen that combined the non-reflectivity of a black hole with the eyeball-searing brilliance of british sunshine (yeah, I'm kidding) so that you could actually see the image you were about the commit to posterity before you took it - and if the screen then provided DSLR-like data regarding what the sensor was seeing, being able to see that would be nice, too.
So while we still have screens that are too dim and too shiny to see in daylight, I can't see the need to upgrade. However many megapixels a new camera (that makes phone calls, too) can boast about.