USB HS, LCD Parallel Port, I2S -- it looks like a chip designed for HMI or other industrial LCD applications. Definitely not for consumer devices when running Linux -- PSRAM is expensive, DDR3 is cheap as dirt.It don't have SDRAM controller yet - just PSRAM. If a future revision got a SDRAM controller this would really become a full consumer-ready Linux chip.
$9.23 at 10k qty, doesn't seem to be consumer friendly. There are cheaper AllWinner chips with design documents available for free form Linux sunxi website, and with some commitment to buy, there are other options such as Rockchip and MTK. Even for bigger brands like Freescale, they have cheaper chips with full Linux capability.
I'm currently working on a music player based on iMX6ULL, it costs less than $5 at mass quantity, and it runs at 528MHz with DDR3L support. It has LCD controller, full Yocto based Linux, dual USB controller and all sorts of standard ARM SoC peripherals (SPI, DMA, ETH, etc.).
I think the new PIC32 is designed for those who have existing PIC32 code and want to add LCD and Linux capability quickly to their expensive industrial products, or for those who want to use existing PIC32 library from Microchip to build an industrial gear as fast as possible, while not being sensitive to cost.