I don't know how real Deldo is, but if you're curious about the state of teledildonics, buttplug.io is widely used and actively developed (link probably not safe for work):
> [Editor's note: Motherboard can't in good conscience recommend that you insert a Joy-Con into any of your orifices. Please don't try this at home.]
> I left a voicemail for Nintendo asking if this is by design and to see if playing anally is an approved means of using the Joy-Con. They did not return my call, and after reading this article, they probably never will.
https://buttplug.io/