The 21.5-inch, 250-nit, 1080p panel makes use of VA technology (like some other Acer monitors, actually), which provides viewing angles on par with IPS. Which is to say, they're wide, and colors stay vibrant regardless of whether you're standing off to the side or you've got the screen pushed down at a near-flat angle.
The 610 has a mechanism that allows you to slide it down so that the display is lying almost face-up and at an almost-flat 60-degree angle, a position HP is dubbing Recline Mode.
During the second quarter, Lenovo announced its new IdeaCentre A520, a new all-in-one desktop PC featuring a compact 23-inch frameless 1080p display that supports multi-touch with a widely adjustable screen angle (from -5 to 90 degress flat) with perfect picture at any angle so users can watch movies, play touch-based games or enjoy video chat in any position.
