Sadly, it's unlikely that you'll ever visit the Trappist-1 system's newly-discovered Earth-sized planets in your lifetime... not unless someone develops near-light speed travel, anyway. However, you'll at least have the option of a virtual tour. Frontier Developments is promising Ars Technica that the second Elite: Dangerous version 2.3 beta will let you visit Trappist-1 and its seven worlds. The developers are really just modifying an existing system in a similar location (Core Sys Sector XU-P a5-0), but that still means that you'll get a rough sense of what it would be like. You'll get to land on at least some of them, two of which will be Earth-like.