I don't think I'll ever be impressed by graphics tech on the Wii, no matter what they try. It will always be impressive only in the context of "But we're doing this on the Wii!". I'd rather have good framerates and decent art set as priorities over "impressive" effects X, Y, Z, not to mention plain old good game design.
Silent Hill: Shattered Memories has struck a good balance. You do have the real-time shadowing, ala Doom 3 from the looks of it, but otherwise it's just simple, clean and sharp. Plus it is generally 60fps, the usual caveats aside, and that just feels good.
The Conduit OTOH made me so angry with its multidunous design issues that I hardly even noticed its DOF effects and particle shenanigans.
Meaning tech should serve the experience, not be the defining property.