Agreed. It does not look nearly as professional, especially the finer details such as the eyes ete. Here is a Photoshop Tut that explains the process, complexity, time and details involved (tracing shapes, colouing etc.).
You can see that some of the examples at the end look pretty good, but even these results imo are not as good as the OP. It is not as easy as some people may think...it takes a lot of time and practice.
http://www.melissaclifton.com/tutorial-vector.html
http://www.melissaclifton.com/tutorial-vector3.html
Charalambous, don't worry about the posters that will pass your work off as something that can be acheived with filters and other quick features. The majority of us are aware of the time and skill it takes to create results like these.
In terms of copyright, I am not sure how that would work with renderings and as some have stated, it would likely have to do a lot with your state, province or country. I do know that here in Toronto, ON, I have seen a lot of artists selling paintings, drawings etc. of famous people on canvas and airbrushed on t-shirts etc. A lot of them set up stands downtown in the summer and display their work on the street or in shopping malls. That is not to say that they are not breaking the law however, we need someone with a law degree to chime in.
