Stof did not say it would replace all other footie games, but it will take away a decent percentage of sales from other consoles. It is selling well now and came way late to the party with no one expecting a Wii version to sell.
And of course some people will cling to the old way of playing, people frequently hang to things that are 'as they always have been'. And if you are playing in tourneys, it makes sense you will feel better with what you know instead of something brand new, like controlling the entire team.
Even it is doesn't dominate, a healthy shift in sales will be felt by the other consoles, and help the Wii. I've got PES2008 and can tell you, the gameplay more than makes up for it's lack of graphics horsepower.
And i'm sure Konami will realize the need to support 4 player local play. I think this years version was a ltest to see if sales were possible. Now that they are, they will defintely want to maximize profits next year.