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Incorrect.

My 4.5 year old 6+ is 401 PPI. The XR is 326 PPI.

Also, Nintendo was given endless crap for the Wii not putting out 1080p and so it wasn't HD. Now suddenly everyone is acting like 720p was adequate all along.
720p on a screen the size of a TV is a completely different conversation than 720p on a screen the size of a phone.
 
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