The Inquirer.net has posted an article in which they tell us a little about what's to come from ATI and also Nvidia in the future:

"...the NV30 will have some kind of Quadro card to follow it and then we will see a FireGL card introduced not so long after the official introduction of the Radeon 10000 - R300.

...we also found an even more interesting product from ATI's next generation hardware line.

I am talking about future FireGL cards that should be introduced just after R300..."
Read the full article over @ The Inquirer.