I would go for it and try to stand out as best as you can you will never know how good it can be until you do it and give it a go.
Well, internet business will never be saturated, as the web masters are using new technologies and even there are new products. So the person who has command over keywords and backlinks is the winner. SEO Outsourcing
Saying internet marketing is saturated is like saying marketing in general i saturated. It all depends on what niche your going after, some of which are over saturated, some of which have barely been touched.
If you refer to an internet marketing niche like to sell ebooks or site subscriptions or whatever that explain how to make money online, I think it will be soon saturated. If you are talking about SEO, well I think the answer is no. Always, new SEO techniques will come up replacing the old ones.
I think affiliate marketing will never die. See there why I believe so ->A business model works for so many years: affiliate marketing.