For PARAM.SFO....well
the flag N8 is confirmed to be for PSVITA remote play (852x480). Sandungas got this flag fews months ago by looking at Torne update and reading the Japanese changelog of Torne...(and it was cryptic not so well explained even you fully understand Japanese) and at that time it was probably the only little hint possible to get flag N8. The hunt still continue for our beloved flags, parameters and category.
After that, there are one or two users trying it (on cfw 3.55 + PS vita) saying it look like having some effect ( less sound problems, less blur image), so anyone who has PS VITA and PS3 should try and give somes reports.