Financially the deal doesn't make sense. ARM has been around for a while their FCF ~500M a year. At $30 billion purchase price you are paying 60x FCF. Apple and Qcom just license the instruction set and design the processors themselves. To justify the $30 billion price they really need to increase FCF to 1.5 billion a year. For a relatively mature business I don't see how it is going to happen.
Mature in the mobile and current marketplace - as has been mentioned in the thread previously, the gamble they're taking is that ARM is going to dominate IoT. With a (potential) monumental increase in the number of connected devices, as well as updating older gen embedded systems, that's where they're aiming for that >3x growth to come from.
