4890's have already dropped in price...2 weeks ago, on Newegg, an overclocked Sapphire 4890 was $239, now it's $209...the stock speed 4890's are at about $185 down from about $250 when they were first introduced.
Every time I check there is almost always at least one 5870 for sale. But yeah, the drop already happened. Since Ati was already doing really good price/performance wise in that range, they didn't have to drop much.
Well, the HD 5xxx series at the moment isn't even in the price range to threaten the HD 4890. When more mainstream cards become available then maybe.
Good point. With the 4800 priced the way they are now, ATi has the whole price range covered with very good cards available. The 4800 cards prices will not come down until aTi produces 5800's in their replacement, like a 5770 or 5830. Only then would you see a price drop in the 4800's