The limitations of Linux compared to Windows

What is the limitations of Linux compared to Windows?

I suppose I can help you with your homework. Let's start by examining your assumptions:

1. Linux is not the only alternative to Windows. Apple's (Unix based) Mac OSX is a very viable alternative, as is FreeBSD. There are other OS's, but few have the capabilities of Windows, Linux, OSX, and FreeBSD.
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2. The only real limitation of Linux compared to Windows is that most PC games are release for Windows but not Linux. DItto OSX. Worse for FreeBSD. Some software (eg Cedega) will allow you to play most PC games on Linux, but not all, and not really easily. It is harder to sync your Windows Mobile smartphone to Linux, but then it's not 100pct reliable on Windows either. In every other respect Linux is similar or superior in capability to Windows, with a minor bit of retraining.
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3. Windows has a massive install base and widespread vendor support. Linux is not as comprehensively understood and supported. This is why people say Linux is harder than Windows, even though you apply exactly the same learning process to Linux that you did to Windows. Many programs are available for Windows that are simply not operable in Linux due to this vendor support.
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4. Linux is better than Windows, because Linux is by nature more secure: the way Linux handles users and permissions naturally limits the scope of a virus or trojan. Linux is also free. Linux also does not participate in thinly disguised blackmail. Linux does not promote vendor lock. Linux presents a similar user experience across hardware platforms. Linux allows a user to leverage training to multiple roles rather than isolating user skills from admin skills.