Why??

From the Sci-Fi Channel website:

Keanu Reeves will star in A Scanner Darkly, based on a Philip K. Dick novel, for Warner Independent Pictures, Variety reported. Richard Linklater (School of Rock) is in talks to direct, the trade paper reported. George Clooney and Steven Soderbergh's Section 8 will produce.

A Scanner Darkly will employ the same technology Linklater used in Waking Life: It will be shot live-action, then animated, the trade paper reported.

The story takes place in the future, where undercover agents change their faces along with their identities. Reeves plays one such officer, and his liberal ingestion of the drug Substance D causes him to develop a split personality, the trade paper reported.

Christ! Why would anyone take a perfectly good PKD story and add that slush-pumping buttnuggett Keanu Reeves?!? Well, you can't blame Linklater as he's not even attached to the project yet. I blame Clooney and Soderbergh. Well, we'll see...