There are no screens of Unity yet!
The screens that people are calling "Unity screens" are from the VLM 3 for the GameCube. That's Jeff Minter's third version of the Virtual Light Machine (the first was for the Jaguar CD, the second was for NUON-enabled DVD players).
VLM 3 is supposed to be included with Unity, but that is not the game itself. So, in a way, I suppose you could call them "Unity screens" due to VLM 3's inclusion with Unity. But, I wouldn't say it's a good idea to label it as "a game that just looks like a screen saver," since the actual game hasn't been publicly shown yet.
"PSP will elevate portable entertainment out of the handheld gaming ghetto." -- Kaz Hirai
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