while i see the necessity and the benefits of arm, developement i cannot see current cpu infrastructure changing much, yea we could def stand to lose the outdated X86 instruction set as AMD's current X64 design had become the norm now, but beyond netbooks and lowend systems arm will have a lot of redesigning to go through to be acceptable for power apllications as its main benefit was light power usage and electricity draw.
I cannot imagine server farms at industrial light and magic being run by anything but zeons for a while.
for that matter graphics designers, autocad users, video editing and gaming. just couldnt be powered by the current direction of ARM, cruise the net and play angrybirds? sure. While it is true a lot of the graphical elements are uploaded to the video cards this is only for the rendering and calculations to create the image. the CPU still churns through the data & AI and other elements. and is apparent on a netbook when watching a youtube video and opening other programs or trying too hard to multitask.
And if they can design an ARM CPU to have top end horsepower it defeats the whole purpose of the arm movement in the first place, whereas it may still be labeled an ARM device but would end up having the same horse power we have today.