I don't know when it will reach the $200 mark.
There may be one this year to like $350, another one next year to $300. It could be a couple years before its $200.
I think a slimline would reall help sales, not everyone wants an 11 pound console. I really think PS3 will reach 100 million though.
I think this could be the first get with 2 100 million consoles. PS3 for sure, and maybe wii.