Chances are this won't put Nintendo back in the lead, not yet anyway.
If they're only just now deciding to change, it could be ~18 months before these changes have any major impact on their company, and if they've only recently started looking at Mobile / Smart Device Gaming, then they're already well behind.
It's good to see them attempting to catch up, and it's the smart thing to do, but I don't foresee an easy ride to victory for them.