SEO does not mean you make any money!!!!!!!!!!!! It just means you were lucky to get to the position you want..... There is no free lunch in life......you need to find better and more ways to advertise your site.
There will be SEO as long as search engines are available. SEO tools are used to make SEO easier wether if was counting backlinks, creating them, improving site optimization. By time SEO tools will get improved to match the requirements of the search engines.
No one knows what future holds for SEO. What you should do is keeping updated on major search engines' algothirm and your SEO efforts should be based on it.