Warrior is basically an A15 clone which uses NVidia's 4+1 approach rather than big.Little (however you're right that by the time Warrior comes out it'll have to compete with the 64-bit A57/A53).
The 30% smaller size is based on a comparison with the 28nm Octa core - however its consists of mostly L2 cache (66%). TSMC has smaller SRAMs, so if Warrior actually has a 30% smaller CORE (rather than a more dense L2) then that would be impressive - certainly if it also gives A15-class performance. But given the comparison I doubt it. See this for an interesting core comparison: http://chip-architect.com/news/2013_core_sizes_768.jpg
Also interesting to see they had to do macro-op fusion to combine 2 loads/stores instead of adding LDRD/STRD instructions like ARM did. I don't think they will ever be comparing MIPS with ARM on codesize!
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.