To Buy or Not to Buy?

Can anybody convince me to buy Nintendo 3Ds.  
I am not Nintendo fan, though NES was my first game console in 1989. 
I own 3 big consoles and PSP. 
I bought Nintendo mainly for WiiFit. No time to play Wii. Maybe my daughter will use it someday. She is under 3 years now. 
But I've got some very good boost in salary. 
But I am not sure if DS games will be for me. 
I know for sure that PS Vita is day one purchase. 
But please help me to decide. And kindly advise some games.