Actually, my hardware predictions for this year aren't half bad compared to last year. The 360 is a little lowballed (it'll be close though) and the PS3 will be decently guessed but the Wii is way overshot though and my prediction was extremely modest for this year compared to most others... I remember almost everyone not predicting 75 million or more nearly getting mocked back in january.
Both the PSP and the DS are overshot as well, I guess the handhelds haven't "held up to" my expectations!