I think he mentioned Win98 because it was MS's last big hit OS - at least for the Home.
Yes, Win ME is the predessor( as in previously marketed to the same consumer group. not
necc. related to the same code base) to WinXP home, but as far as people buying it and upgrading
to it goes... Well the way I understand it it was a flop.
Win98 on the other hand was(again the way I understand it) a relatively huge hit.
-Kyle