I'm really glad that this is happening. One, big screen Layton!!! (Albeit junior) and second, I was put off by the 3DS version due to the obscene practice of paid DLC which I believe cost about as much as the game itself!
Level-5 would be absolutely stupid to excise touch controls from this release.
I have only just started playing Miracle Mask (so I have quite a bit of catching up to do) as I gradually explore my back catalogue of 3DS games. I was about 5 hours into Miracle Mask, but it had been a few years since I had played it last (and I had no memory whatsoever of the story or puzzles) so I started a new file.
These games have such lovely soundtracks. I would definitely be keen to buy if they were available.
Source : http://www.nintendolife.com/news/2018/05/laytonrs_mystery_journey_katrielle_and_the_millionairesr_conspiracy_dx_is_switch-bound