Computers in the European Union should be sold without a bundled operating system, according to this submission to the European Commission. It says that the bundling of Microsoft Windows with computers is not in the public interest, and prevents meaningful competition in the operating system market.

ok here's a piece of heresy for you
would a market place full of competing OSs none of which had market dominance be good for computing?
no common platform
no standard API
would open standards and interoperability (which sounds wonderful) become reality or would we face a fragmented market with software vendors having to write x number of versions to run on a variety of OSs
now we have (please correct me if wrong software expert i am not) windows, macs and linux (solaris) and that's it
my question is basically
how practical is it to write one piece of software with an interface layer to plug into x OSs? (this is a genuine question not rhetorical because i'm genuinely interested in the answer)