With multiple foundries at leading edge able to manufacture ARM, I think the cost advantage is still in ARM's favor. In fact, wouldn't Intel even consider manufacturing ARM in its new reported foundry service capacity?
This may be good for cosumers. However, this is demanding task and needs lots of research, design and marketing resources. Margin may not be high. Should Intel be more concerned about this market? If yes, will Intel suffer from unable to focus on their core strength and market?