I assume you mean these - http://www.wacom.com/en/us/creative/intuos-pro-l ?
In my experience, almost every artist will have one on their desks. For concept art / digital painting they're essential. For texturing they're almost essential. For 3D modelling, they're optional -- many just use the mouse, but I've also seen many artists who have gotten used to the tablet so much that they hardly use a mouse at all!