Talent alone does little or nothing. Talent + hard work = great potential. Talent + hard work + luck = success.
For a great psychological (layman's) treatment of this, see Mindset: The New Psychology of Success by Carol Dweck.
For a great psychological (layman's) treatment of this, see Mindset: The New Psychology of Success by Carol Dweck.
The harder I work, the luckier I get
So, in this sense it's actually irrelevant whether or not inborn talent is necessary, because the mere belief that it is could have negative effect on your effort.