Don't worry, Rick. Each of these variant has its own targeted market. And it's a good think that there is a choice for developers. The fittest will survive. It's much better than the closed world of 10 or 20 years ago.
Holy Cow, the Imagination press release really opened my eyes to how fragmented the world of open source--epseically Linux variants--is:
"prpl will contribute popular OS distributions for MIPS including Android, Arch Linux, CentOS, Chromium OS, Debian, Fedora, Gentoo, MEOS (MIPS Embedded OS), Montavista, OpenWrt, Redhat, Tizen, Ubuntu, WebOS and Yocto, with more to follow. Additionally there will be a wide open source code bank for: LLVM, kernel, UEFI, gcc, buildroot, MIPS optimizations/SDK, and more."