Well, it does matter since the blue pixel is bigger than the other two. How do you compare ppi in that case with another tech. The fact that you mention 1080p just make me roll my eyes. ppi has nothing to do with 1080p, nothing. You can have 1080p on your TV with a different ppi than your phone.
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Well, if you like a blueish screen then you go with pentile, that is not RGB accurate like the IPS LCD.
Or you know, you just change the display mode in settings to one of the more accurate settings. People still think this is an issue? It hasn't been one since the Note 2 came out with display presets in its revision of Touchwiz.