Various Unices will remain the choice for dedicated Internet servers as long as the UNIX software is more robust, secure, scalable and faster than Microsoft's offerings. With more solid software from Microsoft, UNIX servers will still remain the choice for some time because of reputation and inertia. Apart from AIX, the graphical system administration facilities provided with many workstation Unices still allow you to edit files. Pop-up search boxes can still use regexes. Hieroglyphic icons don't rule out a command line.
More functionality is good.
Free applications would be better, though. In niche markets, we'll always have proprietary software because those markets can't or won't fund new products, and software companies can't guarantee they'll sell the support needed to pay for development after the fact. Legal issues aside, buying shrink-wrapped proprietary software is a bit silly when you can get the same software on a CD for a dollar. I think people pay more to get the packaging, documentation, support and other services available to retail purchasers. Proprietary protocols are more likely to have holes which are later exploited by crackers, are a bit immoral and potentially illegal.