Dome bird cages offer additional space in a bird cage, without taking up more space in your home. While large parrots would definitely appreciate the extra head room, smaller birds would likely enjoy the extra space as well.
If you are still unsure whether you should get a dome bird cage or a play top, keep in mind that while a dome bird cage provides more room inside the cage, a play top provides a nice play area outside of the cage.
As you know, it is very important to give birds time to stretch their wings and see the world from outside of their cage. But if you already have a playstand, play gym or some other outside-the-cage play areas, then one of our dome bird cages would be an excellent choice for you.