Well, how about an iPhone version?
More seriously, it could be a "tiny" version with only support for some older games that don't require superfast hardware (that would suit me as I'm an old-school gamer myself
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There was a MAME version for my old Sony Ericsson P900 years ago that ran some older games rather well (Galaxian for example). There was even a variant of that version that ran on some type of digital camera.
