a quick piece of information. WoT RU supertest is currently running a test of a new launcher. In it, you can select whether you want a HD or SD client. The SD client has only low resolution textures and is intended for poor computers. Apparently, according to the leakers, its size is only 5GB, while the HD version of the same client has 10GB.
The leakers speculate that this is connected to the future HD environment (maps and such) as well as the HD tanks and that it will allow the players with poor PC's to play comfortably.