This thread on the Steam Oddworld forum is intriguing:
http://forums.steampowered.com/forum....php?t=1382154
http://cdn.steampowered.com/v/gfx/ap...g?t=1275939146 an additional image
At first I assumed that these screenshots were just how the game looked when fit for a 640x480 screen, but comparing it to other screenshots clearly shows that the graphics have been improved, Abe himself looks considerably different.
I'm not sure how long these screenshots have been up, but I've never seen them before. The other possibility is that these are just game artwork that looks almost identical to the game itself, but it would be very interesting if it was a sign of things to come.
In the VG247 interview, Stewart Gilray was asked if there would be HD ports of the old games. He said that anything they do on consoles (assumingly PC too) would be in HD, which makes the idea even more plausable. The only thing that seems strange is why thse images would be up on Steam, unless Valve/Lorne are teasing us with screenshots of the games.
(Now waiting for someone to tell me that these are 10 year old images from the games manual etc.

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