the better the source quality, the better the image will be displayed. reguardless of resolution.
This is like trying to say if you have a 5 gallon bucket you will fit more water in it if you keep pouring water into it.
In order to see a difference between 720p and 1080p on a small screen you have to be close to it. It is physically impossible unless you are an "alien" to view the difference on a retina display and a standard 800x600 screen for a 7" screen at 4' or more which is typical in a car.
If you have a monitor that only has 800x600 pixels it can't physically show more.
Not sure why you are bothering coming on here and asking for advice since you already know everything.
You must have magical equipment since no one else has the same experiences you do...
If you could actually run a desktop computer with add on high output graphics card at only 10watts then tablets and laptops are a waste of money to use all of their special low power components.
Good luck on your project, you obviously know more than people with decades of experience with this stuff...
from its start this thread has gotten nothing but negative responses. not a whole lotta support for an individuals aspirations and personal goals. mostly judgement and belittling, to be honest. i have been trying to defend myself and my projects since the first response. imho this is a poor way to welcome a new member/enthusiast.
No negativity here man, everyone's preference in what they want a carputer to do. Me, personally just want it to work, provide me with my choice of entertainment, vehicle information all with the ease of big button interface I have my big stuff at home if I want power or 1080p stuff. I want a trouble free drive as it's stressful enough with the idiots on the road. Enjoy your project and provide detailed reports of your progress. Good luck SNO
retna displays are about pixel per inch that the human eye can distinguish. even at 7" a retna display is 1920x1080-1920x1200. also, for my 3 young children, I find myself using any video converter to encode movies in .dpg format. the 3ds' only run 320x240 res. and anything above 24fps. they won't play smooth. if I start with a regular standard def 700mb movie file, it comes out ok, BUT, if I start with a 8 or 16gb .mkv, it looks like i'm watching hd on the 3ds. and it converts to the same res and same framerate. it goes through more steps in the conversion process, and it does take longer, but there is no mistaken the visible difference. and that is on only a 3in screen. I understand logic that 800x600 is 800x600 and 320x240 is 320x240. and I know how my claim sounds. but please, can someone recreate what I am explaining and see for yourself.