What does Second Life offer to people?

After watching this video;

I have realized that SL really does offer a few things that the real world cannot offer. For one, there is a feeling of living forever. Many people do not realize this, but it is true, because there is no idea of disease, illness, or age at all in SL, you are who you want to be and not what was chosen for you. Which brings me to my second realization. For the millions of people with disabilities, SL offers them a shot at doing what they want to do, and being who the want to be. As the video shows, people who are less capable than the norm, are able to go out an socialize, meet people, fly, and do what they want.
Also, companies are branching out to certain publicity firms that are taking companies "virtual" as they bring popular brands into SL. As stated in the video, footwear is one of the most popular accessory bought in SL is footwear. Reebok saw this as a potential market, and is expanding upon it, bringing their footwear and apparel to SL stores.