There are many positions that can be done by telecommuting from home, but there are some jobs out there that aren't possible to telecommute with. Here are some of those jobs that you won't see anyone doing from their own home anytime in the near future:
Notary Public - A Notary public's main job is to witness signatures on legal type documents. The documents would have to be taken to a designated point where they would witness someone signing the appropriate papers for authenticating reasons. Having individuals come to your home to sign the documents isn't professional and can alter the authentication process of the legal papers.
Interior Designing - While some of the work could be done at home like creating designs on the home computer; most of the work would have to be done onsite as measurements would need to be taken and other considerations would need to be done. There would be visits to stores to find the necessary items for the design project. Very little of the work could be done at home.
Hotel Hospitality - This is a position that is better suited doing onsite. It's more of a meet and greet type of position. While there is phone work involved, a lot of in-person tasks would be performed as well.
Real Estate Agent - This type of job involves a lot of computer and phone work, but there needs to be some visiting of homes and businesses in order to make the sales. Prospective buyers can view pictures of the place on a website or call an agent for details, but they will want to see the properties in-person before making a decision. The agents will also need to visit the places that sellers want to put on the market to check for readiness of sale.
Person to Person Sales Positions - There are some sales jobs that can be done from home as long as they are done by computer and phone. The person to person sales jobs need direct contact with the potential customers, which can't be done in a home based office.
Court Reporter - This is a position that is performed in a court room as the proceedings are being done. This is not to be confused with the scoping careers that people work from home helping the court reporters with transcribing files.
Computer Repair/Technicians - This type of work involves direct contact with a user's computers in their homes or places of business. Sometimes the evaluation of the problem includes checking out existing wires in the home or business, so this job isn't suited for telecommuting.
Take a look at each job position out there that you come across and see what the work tasks are for that position. Could they be feasibly done from a home office or do you think they're best suited for onsite work.