Virtual business centre

My friend is thinking about a virtual business center creating where small business units can occupy an virtual office; perhaps it will have a big virtual conference hall, where participants communicate online in a separate virtual room; besides the center would have fair and exhibition hall. I have not came across to something like this. What do you think? Is it worth money and forces investing?

I guess what you need to think before you start is how you would sell the idea to a business. What advantage does a business have for a virtual business conference hall, for example.
It seems to be an interesting idea, but others may not think so.
Good Luck.