I could find some interesting games for NDS, like Orcs & Elves, Mazes of Fate or The Warlock of Firetop Mountain. Nothing like these for the current generation?Don't bother with either handheld if this is your criteria, its gonna be nearly impossible to find anything barring Sony's small first party lineup for the Vita (which is pretty much all shit outside of the Desu Desu stuff like Soul Sacrifice).
Yeah, if those are the criteria, then an Android tablet or an iPad are probably better choices, as there are at least some PC RPGs that have been ported over (BG series, Icewind Dale, KOTOR, Avernum). Original content on those platforms isn't anything to write home about, although The Quest Gold on iOS is decent enough.
Orcs & Elves was pretty fun. How are the other two?