I, personally, am NOT too worried about this.
Yes, I do plan to buy a Sony camera in the near future BUT I am not going to rush headlong and get one before Saturday.
Having waited THIS LONG and I am going to wait till April 23rd to see what Sony announces.
In the current market Sony has to keep prices competitive. So IF these rebates end, Sony will have to come up with new ones.
So, do NOT PANIC.