George wanted… to wait until RotS was finished to release the OT on dvd … until he realized fans had waited long enough.
The fans waiting didn’t have anything to do with it. He released it before ROTS to remind people that they actually like Star Wars and drum up a little excitement before they troop off to see the latest POS.
Well, he also realized that.
A third factor is that waiting until after RotS was out (probably so he could package a I-VI “saga” dvd release) would have placed it only a few months before there would be actual hd disc formats on the market. Hilariously, he released the GOUT - laserdisc era transfers - after that.