I think this is where the 4DS will find its "place". A market of games not driven by F2P and the thread of insidious greed that often comes attached to the idea. Moreso, they can push the idea of a "consolidated" handheld for all gaming needs that will have access to all of the popular mobile games (by having proper engine support this time around) on top of the aforementioned paid market place for games.
The lack of any seemingly relevant competition from Sony, means that Nintendo will not have to compete with ghosts anymore, but more tailor their future hardware around the developments of Mobile. Not fight it, mind, but make their device more "preferred" both for developers of more ambitious titles and for gamers more interested in... more ambitious titles.
(Slap on the WiiU browser, ability to play music while in low power, and access to the popular apps with good functionality, and you've got a good "entertainment" device not held back by the successions and design philosophies of a mobile phone.)
Maybe it'd be better to say "slap on the New 3DS browser", since it has the best score for a console broswer (better than PS4!) according to HTML5.com.
Naah, seriously, if they obtained to get such a good browser on a still very outdated console like New 3DS (yeah, 256MB of RAM and other differencies...still very outdated compared to more recent overall offerings), I wonder what they can do on a much better handheld, spec-wise.