It's the textures, texture effects, lighting, shadowing, etc. that really make things realistic, not the amount of polys (if you know what you're doing..)
The T-Rex in jurassic park had 70,000 polys. There are ships in Rogue Leader/Rebel Strike approaching that number...
Oh, and there have only been 3 3D Zelda's in the past 2 generations (1996 to now). That's hardly reusing the same things over and over again.. Especially where there have been 3 Jaks, 3 Ratchets, 3 3D GTA's, 3 Need for Speeds, etc. in this generation alone. Reusing franchises over and over is when you have a new game in the series every year (the EA approach). I don't see how Nintendo can be blamed when there have been 2 3D mario platformers in the past 8 years, and we had to wait 8 years between Super Metroid and Prime/Fusion. It's because people lump all the Marios and Zeldas and such together. I prefer to think of the Mario platformers, the Mario RPG's, and the Mario sports as 3 seperate series, same with 2D and 3D zeldas... Unlike Final Fantasy, which made a permanent jump from 2D to 3D and is thus one series, Zelda exists in two distinct forms that may share similar storylines, concepts, etc, but they still play differently. Same with Castlevania and Resident Evil. Who considers Castlevania 64, Lament of Innocence, and the upcoming Curse of Darkness as part of the 2D Castlevania line? Or all the RE spinoffs as part of the true series?