That's so very wrong. It is not the same thing. Maybe it would feel similar if they had a rough canvas surface on the Wacom that yielded to pressure (not the slippery slick "pressure sensitivity" they build in) and if that tablet somehow exuded a substance with viscosity and olfactory stimulants. A stylus stroked across a digital tablet is nothing like true painting, either in execution or result.
Originally Posted by Andrey
In fact, I would suggest that "digital painting" is further away from its parent than is "digital photography."
Sitting at a desk marking a Wacom tablet to make "brushstrokes" on a digital image file in a software program like "Painter" is more akin to sitting at a desk marking a Wacom tablet to make corrections on a digital image file in a software program like "Photoshop."
Getting out of the chair and using your whole body to drum paint into a canvas is totally different experience.
A "digital painting" also lacks facture and that is one of the hallmarks of Painting.
For a good read try James Elkins' "What Painting Is"