Of all the nations of the world, the one that has lost the most (at least in the short term) is clearly Iran.

On the other hand, from the longer term point of view, it looks like big part of the business model of UAE/Dubai (a safe, luxury place for rich) has been shattered and I don't see it coming back.

In the short term, they might want extra revenue, but in the long term, creating extra tensions with their neighbour can't be good.