But what's new and exciting about DirectX 11, you ask incredulously. How about a "new compute shader technology" that gets your GPU ready to do more than just boring old 3D graphics – instead "developers can take advantage of the graphics card as a parallel processor"? Not doing it for you? How about "multi-threaded resource handling that will allow games to better take advantage of multi-core machines" since, y'know, most every computer nowadays has multiple cores? Or "support for tessellation" which allows "developers to refine models to be smoother and more attractive when seen up close"? Something in there has to tickle your fancy.
What it probably means for most of you is this: as hardware manufacturers develop new chipsets to take advantage of DirectX 11's new features, you should be able to snag some of that older 10.1 gear for a song.