Acer were teasing some deliciously high-res displays at the Consumer Electronics Show last week in Las Vegas, where the company showed off a 15.6-inch display featuring a 2880x1620 resolution.
Apple's Retina models of the MacBook Pro family sport 2880x1800 pixels, so Acer are getting very close. Acer's panel has a 16:9 ratio compared to Apple's 16:10 panel. There's no concrete information on whether the display uses an IPS panel or relies on another panel technology, but AnandTech have said that the display looked great in person, with great viewing angles and better colors than TN-backed screens.
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