Can hentai animation ever be good?

Adult manga makes use of detail, shading, light reflection, and lots of speed lines.  Can the same feeling ever be conveyed in animation, or is it doomed to look flat with the same colors, repetitive frames, stiff looking physics, and poor liquid effects?  My Lovely Lover and Hard Love Life are some good experiments in combining 2D with computer animation and vectors, but can more be done?  Or will manga speed lines always be superior due to the reader having their own personal imagination of speed and force?