Zloth
I smell a... wumpus!?
Many games let you pick your texture detail right now. Simply give people playing on DirectStream capable PCs bigger options.You're not going to be making games that push the envelope because of the instant streaming, if you have to allow for backwards compatibility with mechanical disks.
They might be able to do more variety, too. When you can load the textures faster, you can be more aggressive with unloading the ones that can't be seen without worrying so much that the player will turn around and have to wait for the world to pop back in.