Ethereum 2 was announced on the first day of Devcon3 by Vitalik. It is a plan on how to manage conflict between need for frequent hardforks and the high costs and risks with hardforks.
In short, if I understood it correctly, it is by using something similar to sidechains. It will be possible to create these without having to hardfork the main chain every time. Please see vide clip from DevCon3 for more details. I am not sure if there is a specific clip for this yet, otherwise you will find it as the last presentation on the first day.