Probably the company may announce a new device tomorrow, Mi TV or any other accessory or they might offer discount on already launched products. The company might also launch recently launched Redmi 3 smartphone in India tomorrow. It sports an all-metal back with textured rear panel and is powered by Snapdragon 616 processor with 2GB of RAM.
Xiaomi has also confirmed that Mi5 will be launched in February this year with Qualcomm Snapdragon 820. Since then wait for tomorrow when something excited is about to happen.