Interview Question microprocessor

Your group designs a microprocessor for use in cell phones and palmtop computers. You currently fabricate your chips on a 0.13micron process. A new fabrication facility with a 90nm process has asked you if you would like to switch to their facility.

What do you believe will be the three most important tradeoffs between remaining with the 0.13 micron fabrication process and switching to the 90nm process?