The size of large art tapestries means they will set the mood of the room rather than compliment it. As a result, you want to select a tapestry that speaks the message you want heard. If you want a romantic setting in the room, perhaps for a bedroom, you should select a tapestry that exudes romance, such as one with a soft floral design or possibly a lover's scene.
Backdrop
If you have a theme to a room in your home, a tapestry may be the way to set the theme and be a backdrop for the other decor items that you are going to use to accent it. For example, if you want a world traveler theme, which is very popular these days, you may wish to choose a tapestry of beautiful old-world maps. This large tapestry of maps will be the backdrop for the items you have collected along your path of world travels.
Art for Beauty
Sometimes you don't really need a good reason to have a wall tapestry in place in your home, you can do it just because. When you choose a piece of art that you are in love with and have to have it, do you stop to think about if it will fit with the rest of your decor? Not likely. Art is special. Art can be it's own entity and will create it's own place in your home. Many wall tapestries are literally works of art. These have been hand crafted thread by thread to create a design or picture that speaks to you in the same way a painting or sculpture might.
No matter your style, decor preferences or home space, there is always room for an art wall tapestry to brighten up the environment, set the mood you want in play, or just to be a thing of beauty that can be admired by all who see it.