I believe the biggest problem for its success is that most companies don't want to give up the control a dedicated installer gives them (e.g. installing AskBar

I believe the biggest problem for its success is that most companies don't want to give up the control a dedicated installer gives them (e.g. installing AskBar that comes with Java, as some comments pointed out). In Linux, dedicated installers are the exception not the rule. I'm curious how the adoption on Windows will be, especially for commercial/non-free software which there is a lot on Windows. I'm also curious how they will present the packages to the average user. Worst case, the user will have to look in three different places to uninstall software (namely System Control, the package manager, and in directories of software that isn't registered anywhere).