Yes, the Samsung Galaxy Gear smartwatch will be successful, because people think the technology is convenient. It will be very help for people who like to run to be able to have all of their technology on their arm. It is inconvenient to carry around a phone, but it is easy to put on a watch.
No, the Samsung Galaxy Gear smartwatch will not be successful as it is a product without a real marketable audience. Young people do not wear watches and find them cumbersome. Older people do not find such gadgetry to be of any practical use. Therefore, it appears Samsung has made a serious mistep.