You'd be missing out on some big $ if you decide not to make for consoles, and I wouldn't be able to play it.
They'll be missing a lot of $ when they won't release it on multiple platforms. Software piracy kills developers who still release pc-exclusive games these days. Just look at Crysis. Game developers are obligated to release there games on multiple platform, because otherwise their games just won't make enough profit due to illegal downloading and copying.
Yeah, illegal copies do make it hard on developers, but keep in mind that a console game is more expensive to develop, and in the case of xbox, for each game sold a part of the winnings go to Microsoft. So If I may guess, winnings per copy is still higher on PC games, but piracy does make it a hard public to make profit upon.