There's absolutely no reason to offer the pre-CGI versions on a Blu-Ray disc in SD, when every Blu-Ray player can play the pre-CGI DVDs, and thus Paramount can sell the sets for cheaper because of the higher volume. Maybe five years down the road, when Blu-Ray adoption has picked up, it might be worthwhile for them to rerelease a four-disc Blu-Ray set of the complete pre-CGI series, but now is not that time.I can't imagine how utterly incapable people are at looking at the near future, and what's going on. If they were ever planning on releasing the originals on HD and further future formats, they would have been on those HD-DVDs NOW.
(And it's better to keep the original at SD resolution, rather than trying to blow it up on the disc; that way the display device can make the decisions about how to enlarge the image beforehand. It likely knows better than Paramount how to make SD content look best on it.)