The impact of a 3D floor plan is much higher than the traditional 2D plans. 2D plans only give you room size, location and arrangements of the furniture to some extent. A 3D floor plan gives you a sense of space, height information regarding the walls and windows, lighting information and much more.
For example, before I want to decide on an unbuilt apartment I would definitely like to see how sunlight affects the interior space. Or how the lights in the kitchen are contributing to the illumination of the dining space. Details like that are not only theoretically important but also is great for marketing. People feel more secure. A 3D floor plan is must-have marketing material for property sales.
Below are some example of photorealistic 3D floor plans created in 7cgi.