A domain serves two functions - to link/connect to a website,
and to provide
information to potential website visitors. Whatever happens to the technology the
name of the website conveys information.
A .com at the end conveys only the information that the website is on the internet. A .mobi conveys that the website is intended specifically for mobile use. With the need for short, concise names for websites increases in the mobile realm (tiny keyboards) then the value of that "mobi" information to the right of the dot - for mobile centered uses - is very great.
