Strange. He talked about that fact that MIPS has been lacking compatibility for Java apps on Android...but completely disregarded the fact that Android L will compile apps natively on MIPS, just like on ARM.
That was true until ARM went and broke this rule with the Cortex A5 (which can optionally have the FPU removed)
Android applications are either written in Java, then compiled on the device to the specific required ISA before running (a processes called JIT compilation), or written in the Android Native Development Kit (NDK) to target a specific ISA. Apps written in Java can therefore run on any ISA that Android itself supports, including MIPS.
I think it was explained pretty well, actually.