That's good thinking. Annual releases don't work for me. I don't even buy new sports games yearly.
All the best games release every 2-4 years - Gran Turismo, Grand Theft Auto, Pokemon, Uncharted, Jak n Daxter, and so on. I'd rather have one superb, highly polished game than 3 ok ones.
Which is why the announcement of Guitar Hero 5 already makes me sad. Such a shame. World Tour could be the last one I buy.