Viz-people are produced in Poland. Poland is overall a very productive country in the field of visualization accessories. (Evermotion is also based in Poland)
It seems to me that all Eastern Europe is very active in the whole archviz area.
But talking about cut out people, viz-people aren't the only company.
There are many other notable companies. The quality, variety and pricing of course differs a lot, you just have to look around a bit.
Here's a list of some sites:
www.doschdesign.com
www.epictor.com
www.vishopper.com
www.gobotree.com
www.easy3dsource.com
www.MrCutout.com
Besides these there's a lot of places where you can find free images, which is great, although the quality often sucks.
I don't think that 3d people will kill 2d people. At least not in the near future. The quality of 3d people have been raising significantly in past years.
And now they can offer some competition to 2d people. But they also have the same problem as many 2d people - they appear unnatural or sometimes just unnaturally beautiful.
The reason is probably the mechanism how they are produced. You can't catch people from the street into 3d scanner and make a snap.
I mean with proffessional models in a studio it's difficult to get a natural looking result. Just one example www.vishopper.com/cut_out_people/people5229 - 3d can't make this yet.
Not to mention that quality 3d people cost around 50 USD, but for this price you can buy around 100 2d people.
And one final note - one thing I don't personally like about people on visualisations, is that when I see the same person a 100th time.
But as I work in the area, it happens often to me
