Gary, 3D content is used in just about everything you see on TV today, to some degree or another. 

Most gadgets you see advertised - like a cell phone, or an iPad, even a coffee maker, are 3D models of that gadget, instead of the actual gadget.  

Many car commercials use 3D models of the car instead of the car itself. 

For the most part, unless its an actual human you're looking at in a tv show or a commercial - and especially a hollywood film - from a single item to an entire scene, there is a big chance that it is a 3D model, and even humans, in some instances, are questionable. 

Why? because it's cheaper than hiring a film crew and renting location space, and you can do more with it in a much shorter time frame and much smaller budget. 

Poser is a low-end program that isn't widely used by the "professionals" but it's becoming a more and more common tool, especially for freelance visual effects artists, who use Poser and similar programs for everything from web graphics to comic books to animated films. It's not yet capable of producing the same visual effects that more advanced software does, so it is mostly considered a hobbyists program, but there are professional artists in all mediums that use it in some form or another.