Budget Nexus 6 may feature a 64-bit processor
Recently, a rumor surfaced saying that Google would be pushing its Nexus program to the limit with the Nexus 6 and aiming for a sub-$100 unlocked price point, rather than the $300 flagship segment. Part of getting the device cost down would be in using a MediaTek processor, and now we're getting an idea which processor that may be.
A report from Taiwan’s Economic Daily News says that the specific MediaTek processor used could be either the "quad-core MT6732 64-bit chip clocked at 1.5GHz, or the octa-core MT6752 SoC running at a frequency of 2.0GHz." Both would be powerful chips with Mali-T760 GPUs, and LTE capable, but the real news is that both chips would be 64-bit and use the new ARMv8 instruction set (which is the real reason 64-bit mobile chips offer big performance boosts).
MediaTek devices tend to be seen as somewhat "lesser" because of the budget pricing on the devices, but these chips sound pretty serious. They may not stack up exactly to a Snapdragon 801, but when you're paying $100 full price for a smartphone, you shouldn't be expecting that anyway.