In fact we're going to see a great difference between those nations that invested the "money from the ground" to develop an economy and those who used it to buy soccer teams.
I think a bunch of those flashy oil-money acquisitions that were seen as wasteful, will eventually be recognised as a decent diversifying strategy in sectors where barriers to entry are very high. The Emirates airline was initially seen as a white elephant, but it kickstarted the Dubai hub and was, overall, a pretty strategic move.