Turn your console into a veritable warp pipe
At a recent shareholders' Q&A session, Nintendo president Satoru Iwata spoke about introducing new releases to unfamiliar gamers through automatically downloaded demos. Just like agreeing to StreetPass or SpotPass, players would confirm their interest in receiving the content, which would later show up automatically. Speaking to shareholders, Iwata explained:
At a past shareholders' meeting, we received the opinion that Nintendo should improve the design of its digital software distribution shop, and I think that we made measurable progress with Nintendo eShop. Additionally, when Nintendo would like to ask users to try a specific new game, we should deliver it to their Nintendo 3DS, and possibly Wii U, with their prior consent and recommend that they just try it and, if they like it, they can pay for it. In this way, we need to introduce users to unknown products. Consumers are likely to be convinced to pay about 5,000 yen for a well-established franchise product, but not all the people are willing to pay a certain amount of money for an innovative but unknown product. Now is the time to prepare for these situations.
How would you like the "New software has been added to the HOME Menu" message to surprise you when you open your 3DS?
Source- nintendolife

Not good idea. This may download every crappy demo that's on the eShop. Also what if I have an internet data limit?