They're going to drop support for 98 soon, I thought they did already. Anyhow 98 is a horrible OS.
It goes like this
2000 -> Done Right
XP -> Done Well, some bad ideas and times changed
Vista -> A good attempt, but again some bad ideas and limitations
Vienna -> The revolution?
I don't know but Microsoft needs to change how it markets and distributes it's projects. I'd honestly rather have it delayed than have features cut. Vista is a really stable OS and a good upgrade to XP but honestly for their prices it's feature dry. If they would offer it perhaps $150 for Vista and maybe like $130 as an upgrade to XP I might see some reason in people getting it.
Of course, people will still own Vista however. OEMs will distribute it on their OS due to their bonds with MS being tight as glue. Microsoft will make profit regardless and with their vendor lockin techniques they plan to stay on top.
I might not necessarily agree with everything MS does but I need to point out regardless they can make some pretty decent software.