NJ5 on 08 February 2008
Considering that HD is one of the main reasons why the 360 and the PS3 are quite expensive, and probably one of the reasons why GTA4 will cost $/€ 60 instead of 50 as was usual before, I'd say yes, HD will hurt GTA4 sales even without counting in the factor you mentioned.
My Mario Kart Wii friend code: 2707-1866-0957
