The Dubai property market is slowly maturing, don't forget there was no Real Estate market as such here 12 years ago, it was impossible to get a mortgage/finance for an expat in thoses days so it really is a case of maturing of the back of its mistakes and the market forces present.
Dubai is the fastest growing city in the world and I cant see this changing any time soon considering the rulers/govt commitment to turning Dubai into the Singapore of the Mid East. The govt is learning as time goes on and introducing regulations/laws to stop the fraud and over speculation that was rife in earlier years.
My view is, that like Real Estate markets all over the world, there will be a cyclic effect and ups and downs, Ive lost count of the cycles Ive lived through in UK but remember well times when there was a buying frenzy and then suddenly a crash and props remain unsold for months and even years, why should Dubai be any different? The major factor that is a big question mark still is will/when will a property owner/investor be able to get a residency visa if a property is purchased , this was promised many years back and still is not the case due to the fact residency is a Federal Govt issue not an individual Emirate Govt decision and the largest emirate Abu Dhabi govt is a totally different mindset to the Dubai govt, very tribal and conservative, maybe there will be a substantial change when the current Ruler SHk Khalifa departs and his successor maybe has a different take on the situation.
Notice I talk about the Dubai property market, the rest of the UAE is a different matter and personally there is no way I would buy in Ras Al Khamaih or Ajman for instance unless I wanted a pure holiday home and tbh I can think of far nicer places to have a holiday home.