LCD is working good, so far I don't see any issues with it, so I'm moving forward to testing out the 16MB external flash I decided to use.  (Still not sure yet if I'm going to really need external flash or SRAM).  The biggest issue is how I'll store/use images, and whether I need external flash for storing jpeg or RBG images, or if I'll need external SRAM for decompressing images stored in internal flash.

I won't know until I really start hammering into it... the FMC on this chip allows you to easily have both SRAM and flash (as you can see from the STM32H7 eval board/schematics), but that would most likely require a 4-layer or larger board to handle both chips... so for now I'm hoping to only need one or the other...