Why does furniture always look great in ads? The beautiful castle or villa as its backdrop is only a small reason. The big visual trick is space: lots of it, not only square meters, but also very high ceilings.
Most houses and apartments are designed functionally, rooms with just enough space to put a sofa and chairs against the wall to sit a normal sized family with a few guests. If there is more floor space available, we tend to add rooms rather than giving the furniture more space to breathe.
The same is true for museums. Huge open spaces with big white, clutter-free walls. Paintings are made to look good in museums. Put that masterpiece (or a copy) on your kitchen wall, and it looks less impressive.
When making presentations, you are not constrained by white space, so add it freely.