as announced before, Wargaming will be splitting the client into the HD and SD version. Current version of the client will be considered "HD", the "SD" version will be 6GB smaller and will have reduced texture quality. They are testing the launcher on the supertest, this is how it looks:
The text says: "Download only what is necessary! Based on the wishes of players, we have split the client into the Standard one and HD one. Standard one is for players who do not use maximum graphic settings, it takes less space and is faster. HD client is for players with maximum graphic settings. Your graphic quality setting: not maximum. We recommend using the standard client."