I think this nepotism stuff I'm reading is overblown. I don't see a problem with Will Smith wanting to help his son succeed. A lot of parents do and would do what Will is doing if they could.
And Jaden has done two films-Karate Kid and The Day the Earth Stood Still-without his dad co-starring. It's not like he has been propped up by his dad for his whole (short, and just beginning) career.
Well his Dad may not have been in the Karate Kid, but both of his parents produced the movie to be a leading role for their son.
At least Aaron Spelling knew Tori wasn't good enough to be the lead character of 90210.
As far as I'm concerned, it's their money and their kid, and they can do whatever they want with it. There's no reason why there can't be family businesses in the film industry. As with normal businesses, the customer, meaning you, decides if the new kid is worth the ticket.