I hope so, they did really well on 3 and even better from what i've seen of 4 (yet to pick it up). I also want DQVI to complete that trilogy on the DS as well. Man the DS has a lot of good JRPGs :)
Currently dreaming of: DKC4 or Sonic the Hedgehog 4 (classic 2D platformers) for WiiWare, Smash Bros. for DSi, New Super Mario World for DSi, a Wii remake or true sequel of Final Fantasy Tactics.
One down, hopefully more awesomeness to come.