Upvote:2
All flights depart from Terminal 1. Terminal 2 is only for check-in. If you stay in the transit area, airside, you can not go to T2. The IMAX cinema is landside. There's not much to do in HKIA, airside. You don't need a visa as an Indian citizen, just to register online before going. You might be better off entering HK and, depending on the schedule, go around visiting, or catching some sleep.