It wasn't that bad.
DOA4 came out in December
You had Fight Night, Burnout, and GRAW in Feb/March
Oblivion came out in April
Hitman and Table Tennis in May/June
It was a little slow in late December and early January, but there were plenty of games to pass the time. After that, there were plenty of great/good games out. People just need/ed to give them a shot