To really drive home the point, Sega told Unofficial RPG Site, "The Vision is primarily an MP4 video player with some basic games functionality, and not a new handheld gaming machine" (emphasis RPG Site). RPG Site goes on to add, "the Sega Vision isn't actually a Sega-developed device at all, and in fact a cheap Chinese iPod-style alternative."
We know, we know. We're upset too.
Source -- Sega to launch PSP beater in Japan [Register Hardware]
Source -- SEGA: "Vision" is real, not a PSP rival [Unofficial RPG Site]
[Thanks to everyone who tipped us to this!]