Capcom have decided not to concentrate their time and energy on any single given console, rather they will develop all their major titles for a multitude of consoles.
“All major titles launched during the next fiscal year or thereafter will be developed as multi-platform games,” reads Capcom’s shareholder report for its fiscal year 2008, which ended on March 31 of this year.

I wouldn’t say this will stop Capcom from creating dedicated Wii (and handheld) games – the quote says all MAJOR titles.
Thanks, I’ve edited the post to reflect this.