Okay, so just to give you a grand range of "PPI" comparisons so you can get an idea of the sharpness level of this screen, I have put together a list of tablets and their display PPI ratings.
|DEVICE||ASPECT RATIO||SCREEN SIZE||SCREEN RESOLUTION||DPI|
|Google Nexus 7 (2nd Generation)||Widescreen||7"||1920x1200||324 PPI|
|iPad Mini (2nd Generation)||4:3||7.9"||2048x1536||324 PPI|
|iPad 4th Gen/Air||4:3||9.7"||2048x1536||264 PPI|
|PiPo M6 - Full HD Mode||4:3||9.7"||2048x1536||264 PPI|
|FNF iFive X2||Widescreen||9"||1920x1200||251 PPI|
|Cube U30GT2 HD||Widescreen||10.1"||1920x1200||224 PPI|
|Google Nexus 7||Widescreen||7"||1280x800||215 PPI|
|PiPo M6 - "Normal" Mode||4:3||9.7"||1528x1200||204 PPI|
|Samsung Galaxy Tab 1,2, & 3 (7" models) & Ployer Momo 7||Widescreen||7"||1024x600||170 PPI|
|FNF iFive Mini3 & iPad Mini (1st Gen)||4:3||7.9"||1024x768||162 PPI|
|PiPo Max M8 Pro||Widescreen||9.4"||1280x800||160 PPI|
|Ployer Momo 12 & PiPo Max M9||Widescreen||10.1"||1280x800||149 PPI|
|PiPo M1 & iPad 2||4:3||9.7"||1024x768||131 PPI|
That chart covers just about every major combination of screens currently available in "tablets". I define a traditional "tablet" as anything that is a single flat piece with a touch screen between the sizes of 7" - 10.1". So, all the odd 6" and 5" and 11" and 12" devices are something else IMHO. Yes they are very similar devices but when you get outside of that 7 - 10 screen range your usage changes drastically.
Regarding DPI and my personally defined categories...
- Unacceptable: 120 PPI and down (i.e. cheap 10.1" devices at 1024x600... 117 PPI... awful...)
- Acceptable: 130 PPI and up
- Good: 160 PPI and up
- Great: 200 PPI and up
- Retina: 240 PPI and up
- Pointless: Anything above 270 - 280 PPI - There just isn't a difference in display quality to the naked eye past this point... unless you are a genetically enhanced cyborg... (if so, please write in... we would love to blog about you!)
(For a different take from mine on this, read this Wikipedia entry on "retina" quality displays here: http://en.wikipedia.org/wiki/Retina_Display)
For those of you who are actually paying attention (snap to!) you probably noticed that the PiPo M6 was listed twice. This is due to a curious feature that is present on several Chinese 9.7" retina tablets that allows you to actually change the devices operating resolution. This is a REAL legitimate resolution change, not just a DPI switch in the build.prop file (for those of you who don't know about this small trick, you can adjust the DPI setting in a file in your android system and it changes the "look" of the screen to a certain extent but it is more gimmick than actual change...). So that means dropping the resolution does change the display quality, but it also increases performance. Giving end users options. I like options.
Keep reading for the significance of this small feature...