As you'd expect, developers have wasted no time in tearing apart the Mac OS X Lion preview, and in so doing they've allegedly discovered some intriguing things -- namely, support for the SSD-wiping TRIM command, and a series of high-DPI display modes which would allow for icons and UI elements with twice the graphical detail -- which could mean a PC-sized Retina Display. The former doesn't sound like the most exciting upgrade, but it's truly a boon for Mac users with solid state storage, as TRIM can greatly improve write speeds in compatible drives. As far as the improved pixel density rumors are concerned, it's not clear whether Apple's actually looking at doubling display resolutions in new computers (9to5Mac imagines a 15-inch MacBook Pro with a 2880 x 1800 screen) or whether Apple's simply moving to maintain icons that are precisely the same physical size across all its displays -- which would make fantastic sense for a touchscreen UI, by the way.

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Mac OS X Lion has TRIM support for SSDs, HiDPI resolutions for improved pixel density?