"Grim Fandango Remastered" will be out just in two weeks - and exclusive pre-orders have now startered at Gog.com. Only some HD wallpapers are included as bonuses, but the remake itself features not only repainted hi-res character textures and new dynamic lighting that were promised before, but also some new controls, the music score re-recorded with a full live orchestra, a set of concept art and over 2 hours of exclusive developer commentary.

Is the remastered still keyboard driven?

That is one of the options.
Mouse is an option. So is the original keyboard.
According to ***this article***

In order to keep our publishers and developers PR people happy, I need to post the official press release that they just released. I will lock this and link to the official notice so we do not have duplicate posts.

THanks for understanding.

You can comment on the official thread here.