Looks like Samsung is upgrading all its current-generation smartphones and tablets with 64-bit processors in 2015 to make full use of Android 5.0 Lollipop. An upgraded variant of the Galaxy Tab 4 8.0 has surfaced on GFXBench with a model number SM-T333, which is equipped with a 64-bit Snapdragon 410 SoC. It is the same processor, which is used in the Galaxy A series and Galaxy E series smartphones, with a 64-bit quad-core Cortex A53 CPU and an Adreno 306 GPU. The rest of the specifications of SM-T333 tablet remain similar to the 32-bit processor variant of the Galaxy Tab 4 8.0, be it an 8-inch HD display, 1.5GB RAM, 16GB storage, 3.15-megapixel camera with HD video recording, or Android 4.4.4 KitKat operating system.
Update: It seems that Samsung is working on another new tablet, the SM-T533, which has received certification from Bluetooth SIG. It appears to be a 10.1-inch tablet, and we think that it might sport a 64-bit Snapdragon 410 processor, similar to the SM-T333. This is possibly the 64-bit variant of the Galaxy Tab 4 10.1, suggesting we will see 64-bit variants of the entire Galaxy Tab 4 lineup in the near future.