...I would love to see these games released in a set to purchase on websites like GOG.com and Steam (although GOG.com would be better).
Funny you should mention GOG.com because Amanita Design JUST
announced that 10 years since the original release, Samorost2 is officially a
Good Old Game!
As for Samorost1 and Questionaut getting released for purchase, I'm pretty sure that the BBC owns the rights to Questionaut and to bring Samorost1 up to the technical requirements needed for a standalone release would likely require a complete re-build. So it's doubtful that Amanita Design would redirect their resources to that older game when they have so many new projects on their drawing boards.
That being said, I do think a special "Trilogy Package" hard copy release of Samorost1, 2, and 3 (when it's done) would be AWESOME!