Thanks for your analysis from experience printing.
BigDaddy wrote:
I think you can print a fairly large print with a 12 MP photo? I don't print much, almost never now, but when I did, I could do pretty good at 250ppi. I never printed a cell photo larger than 8x10, but would not hesitate to do a 16x20 with a 4000x3000 photo. A 300ppi 16x20 calls for 4800x6000 and even my 24mp DSLR only does 4000x6000 so I know that's a bit of overkill.
I know for sure 1920x1080 is all that's needed for all my digital displays, from small cell phone to 55" HD TV.