How does one go about determining a good minimum GPU requirement for a game that development is starting on, that will be published in approximately 2 years?
On one hand, you want as many people as possible to be able to play it, but on the other hand, you want the capabilities to be as high as possible for a better experience. The higher the DX/GL API you can use also means some things will be much better optimized.
My current idea is basically to identify what GPUs of the past have done, over a two year period, and identify the best one at the moment that will more than likely be hitting the bargain bin at the expected release date.