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easily noticeable between the iphone 5 and the htc one. not like the jump from 800x480 to 720p, but i wouldnt want to go lower in my next generation phone anymore. and why should i?

now apple, listen up, how about a "retina" screen for the macbook air, its quite ridiculous that my air has a way worse resolution at more than double the size than my phone.

Not to mention the current Air's display has poor color accuracy and terrible viewing angles.
 
Note 2 720p display cause of its 5.5 inch screen u can notice pixels.

Note 2 or any larger 5 inch phone plus screens benefit from 1080p cause they are not retina quality.
 
I can't say I've noticed it on my Xperia Z, but in future I certainly don't want anything less than 1080 as it's now the standard for phones.
 
On phones (even the ones with 5" screens), it does not matter. Like you guessed, it is just a marketing gimmick.

No it isn't. I have owned a GS3, GS4, and Nexus 4. And the screen on the GS4 was the best display on a mobile device I have seen to date. It bested both my GS3, and N4. I can honestly say that it was night an day difference.
 
It doesn't necessarily use more battery. A 1080p display might have a more efficient graphics component on the chip and a more efficient backlight, so it might be way more battery efficient then a 320p or retina display.
 
It matters more when reading tiny text, like a website with no mobile support and thus zooming is required. More, smaller pixels means more readable tiny text. That said, I don't think it's a particularly necessary feature as 720p displays are already high res enough.

Is there any comparison for battery drain betwen 720p and 1080p displays?
 
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