Sources not available yet... But i think that changes only affects android platform and not kernel. All HW accel was done in 4.0, so 4.1 should only optimize android itself (dalvik, gui underlying libraries, etc).
Nexus and RAZR share same CPU (OMAP4430/4460 - the only difference is CPU freq, so technically we can use libs from nexus without any problem and without recompilation since libraries already optimized for or CPU), same GPU (PVR SGX 540, however nexus's GPU is slightly overclocked) - so H/W accel should not be a problem
So there is a good change that someone will port 4.1 to our devices. Or maybe i'm just wrong