I just read a post by Bruce Byfield, where he raises an interesting question: after the fact that Canonical will try and offer commercial software from a specific repository, would anyone use it?
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But why doesn't he see that this service may not be different from other software distribution methods? It seems he more argues the fact that there are proprietary and commercial application offers in Linux, than the fact that they are provided in Ubuntu. But, as it seems to me, the main reason for Canonical to do so is not for all Ubuntu Desktop users – its for business users and maybe even Ubuntu Server users, who may use those proprietary applications for their businesses and need a standard way of installing applications. Why should the way of installing Parallels be different than one for installing Open Office? It should not.