Latest ARM processors have many features inbuilt, And even the cost of arm processors is comparitively less than other processors.
There are different range of arm processors available for different purposes like for latest mobile ARM 11 series would be more suitable, and the most contemporary mobile devices use ARM 7 processors.
There are many features for an ARM processors such as
security zone,
power management,
jazelle technology, so that there is no requirement of software interpreter(java).
And most of the industries contemparary EDA tools support.
And many more features.
This may be useful.