The widescreen versions weren't done in 1998. TNT reran the full screen versions. Sci-Fi channel didn't do the widescreen versions until 2000.
Why would sci-fi channel get every episode converted *except* for the pilot if it was done that way? That makes no logical sense.
And they did do a faux widescreen with it at the time by just cropping the top and bottom. If one has seen the two-part split of 'The Gathering' they would have seen this version.
Also here's an earlier quote from Joe from 1992:
Although the movie is too early, we're giving some thought to shooting the series for HDTV, but again that's well down the road.