Sure ARM9 royalties are a bit higher, but ARM7 are a bit lower. The $0.15 average royalty consists of ~60% ARM7, ~40% ARM9, so it is the relevant number to use if you expect a similar mix.
replacing all your current ARM
emerging
If you could get a big segment of the smartcard market you would indeed get good volumes. It's a mixed blessing as smartcards don't attract high royalties. So while
100M units at $0.10 royalty sounds nice, it would be nontrivial to actually get there.You can use fewer people but then it takes more time to develop something. The total investment is going to be similar but you risk a competitor getting in there before you.
Wilco