My Stats are 69.91% Search Traffic, 6.05% Referral Traffic 23.58% Direct Traffic. I am not sure how useful the numbers are - for example the top 6 search traffic phrases are all variations on my brand name, so more like direct traffic. My direct traffic has increased alot lately - and I think that is these new browsers that don't pass referral information. i.e. the direct traffic is probably search traffic. So ... I'm not sure what the numbers say.
yes it is difficult to evaluate future of a website with the stats .but there are somethings. for example if the present of search engine is high it means you have a free advertisement on search engines with very much visitors . what is your daily traffic and how many years history you have ?