How does digital painting change animation industry?

Since the first hand drawing animation Fantasmagorie were created in 1908, this bran new style of film been fashionable. Nowadays, more than 40 animated films are released every year. However, in today's animation industry, there is no trace of paper and pen, they are replaced by computer or ipad. How dos digital painting change animation industry? Is traditional paper and pen painting completely lost its influence in this industry?