Warp Speed! Is an enjoyable compilation of the evolution of the warp drive effect from Star Trek movies:
... from the spectacular neon streak photography of The Motion Picture through the rather less awesome animated trails of the later TOS movies to the feeble CG of Nemesis, where they couldn't even be bothered to include the 'warp stretch' effect. And what's with those smoke trails? Has the Enterprise got a cracked manifold? *sigh*
Link [embedded YouTube]