I would say the total market for all 3 together will be 200 million at least... probably nearer 210 unless Wii achieves blue ocean a lot more than it has so far... so first think of that.
Japan may have little growth in home consoles, so 30-35mil
America might get a reasonable growth, from about 70-75 last gen, to about 90 this gen.
Europe could get a huge boost over last gen, from about 60m to 80-85m.
then there are the other regions of Asia which are hard to predict, but surely 5m minimum.
so based on that I'd say;
Wii 120million
PS3 55 million
360 35 million
but there are many things that could change the total market size [China/India success and Blue ocean, as well as Blue ray]
Wii has the potential for 200mil+ but I think it will fall short... could be 150mil, giving a total market of 240 million [60 more than last gen]
So thats;
150mil
55mil
35mil
