Apps will still need to be modified for the smaller or bigger screens, and I doubt the APIs will be exactly the same either. Plus, this will only apply for new

Apps will still need to be modified for the smaller or bigger screens, and I doubt the APIs will be exactly the same either. Plus, this will only apply for new "WinRT apps" and only to Windows 9 devices. So maybe it won't be 4 percent, but it will be 14 percent, at most, like what they have now in "computing devices" as market share.