The 'series' could, but the launch GF100 will have no impact on mid-range and low-end models, it's not even close to their market. It would be like asking will the price of the new Bugatti affect the price of the Chevy Cobalt or Honda Fit.
The only thing that could possibly influence the prices of the mid & low range cards would be the introduction of something that is in that segment, and that's not expected until the summer.
Eventually it will influence prices, but if you're looking for some price changes in March it aint' gonna be Fermi that does that, heck they'll be hard pressed to get something into market for March to influence prices on the high end, especially since it will likely arrive with low volume and a street price likely well above MSRP in order to get one.