At this rate, 3DS is never going to catch up with PSP is it?
it depends if they'll see another decline next yera or not.
PSP is at 20 millions. 3DS is around 15.6 millions.
PSP is no more distributed in Japan.
3DS sold 1 million so far in '14, while last year sold 1.8 million at week 24.
At the end of 2013 3DS sold 4.8 millions. That means that it sold 3 millions from week 24 and the end of the year. If we assume a similar decline YoY the 3DS could end the 2014 selling more or less a total amount of 2.8 millions, reaching 17.5 millions.
if next year it will sell similarly to this year, it will be on par with PSP.
So, it depends to me if they'' see another decline YoY or if they'' be able to stay stable (introducing a new model maybe? maybe the 2DS, or maybe with NFC technology integrated to interact with amiibo?)