Well, I know Lexus. I've heard people spout some pretty grandeouse changes for 2004, but I dont see it happening. Basically what we're going to see is a mid design refresh, similar to the differences between the 97 and 98 LS400s. We may see some engine and drivetrain changes, but they'll be slight. I dont think we'll see AWD as an option next year. So you can probably expect a new front fascia (headlights, grille, bumper, hood) perhaps a rear lamp freshening, probably wont be any sheetmetal changes in the rear. New wheels for sure, 17 inch standard, maybe an 18 inch option. Perhaps a sport package, new seat options, colors and wood choices, nothing more than that.
Now, in 2006 the car is slated for a total redesign, there's where you'll see any big engine changes, AWD things of that nature.