Friends i have a really important question

tell me games this time around prices don't go down they stay 60$ for about 2 years it's outragous i mean when ps2,game cube,xbox was out price will start at 50$ then 3 or 4 months after release price would go down 20$ or 15$ bucks.Now for my question on this gen.Why are game not long?is it because of the graphics just because you put alot into the graphics dose not mean the game sould be short.don't get me wrong now i love the graphics this gen but it's just the game time.What i think is people think so much about the graphics they don't worrie about the game time.but one thing i heard is the 360 effect''Yes im a 360 owner''but any it effects the game time hear that it's has to do something with the hardware of the 360 witch why game time is short now what do you think?