As Nvidia knows, not everyone needs or can afford massive 8800-based $300+ video cards, but might still want various features that the newer generations of cards bring. They are responding, with the 8300, 8500 and other 8600 based cards, all supporting DX10 and aiming at a midrange market. Last week at CeBIT, MSI was showing off some of these G84 and G86 based cards. The newer cards of course support HDMI, and for those into quiet computing the lower end models (such as the 8300) will feature passive cooling, a welcome relief from the leaf-blowers that accompany the high end cards.
No pricing or specific availability dates are out, yet, but as DX10 is still rare in and of itself demand for them is lower than it will be.