I don't doubt that, you see Arab fans all over the internet, but it's still a non-traditional footballing country.
With the US, Japan, Korea, you see football developing at a strong rate, that's what FIFA should be trying to achieve here with the hosts. I think FIFA realises that a resurgence in the Arab national teams would be important for them financially and in terms of competitiveness. Aside from Saudi and possibly including them, also Iran, those teams have been on the slide for too long.
You see the club sides doing well across the continental competition, because they are projects for wealthy owners. But the emphasis needs to be on developing national players rather than being competitive with big money foreign players. China have also been particularly poor at this.
At the end of this you want to see fans following and proud of their domestic clubs and national team. Not just a moment in the sun (excuse the pun), and then back to the lazy routine.