Yesterday Nintendo finally unveiled some details about the upcoming Nintendo Switch Online program, including the fact that it comes with a digital library of classic NES games. However, Nintendo has not yet revealed details regarding other retro libraries, like SNES or GBA. Kotaku followed up to inquire about Virtual Console details, but Nintendo's answer probably wasn't what you're hoping for.
We've speculated for some time now that Switch wouldn't be getting a traditional Virtual Console. Nintendo executives like Reggie Flis-Aime have been very careful to avoid using that exact phrase when discussing what they plan to do with classic Nintendo IP going forward. In a statement to Kotaku, Nintendo confirmed our suspicions, officially stating that there are no plans for a Switch Virtual Console.
"There are currently no plans to bring classic games together under the Virtual Console banner as has been done on other Nintendo systems. There are a variety of ways in which classic games from Nintendo and other publishers are made available on Nintendo Switch, such as through Nintendo Entertainment System – Nintendo Switch Online, Nintendo eShop or as packaged collections. Nintendo Entertainment System – Nintendo Switch Online will provide a fun new way to experience classic NES games that will be different from the Virtual Console service, thanks to enhancements such as added online play, voice chat via the Nintendo Switch Online app and the various play modes of Nintendo Switch." — Nintendo
While there won't be a Virtual Console, we'll likely still see classic Nintendo games popping up in one way or another. Nintendo has too rich of a library of established, successful franchises to ignore completely. Third party developers are already doing this in various ways, such as the upcoming SEGA Ages lineup.