[cxS]

This idea doesn't make much sense, you can already easily create dynamic controls with Windows store apps.

I need to add them customly and that's pretty hard way harder than windows forms.

Why? It's still a drag and drop interface. Plus you can even in addition to DirectX, create controls via JS/HTML5/CSS. If anything it is easier, and you've got more options than Windows Forms.. Is this "idea" a lazy excuse not to try something new or?

No I have always preffered windows forms and I'm dissapointed that it isn't an option in windows 8 apps

Is it available for games? So why would it make sense for Windows 8 store apps? They are essentially built for touchscreen. Who wants to fool around with Windows form apps on a device like a surface? Or some other tablet like touchscreen device?

Windows Forms are for desktop programs, nothing else...