I think the best we can hope for is retention of 3DS support, general interest from Japan getting the bigger titles that PS4 and often XBOne get (thinking big Capcom, SE, BN titles), and Dance/Sport/CoD support from the west. All of these are not sure things, e.g. Level 5 is, say, trending mobile, NX might not be able to run, say, FFXV, or might not sell well enough to get EA sports back on.
The dreams of sharing or absorbing Vita Japanese support, or of sharing, say, Persona and other smaller audience JRPGs with PlayStation seems, while not impossible, more far-fetched. There is less of an impetus to be multiplatform in those cases; there isn't a working relationship to work against the pull of jumping to mobile in the Vita case. Nintendo's biggest chance in these regards is with the handheld unit, if it is successful in Japan and cross-compatible with a home console capable of accepting PS3/PS4 and PS4 games. This could draw some formerly PS exclusive games to be multiplatform.