I think Massacio's work is important because it influenced and paved the way for other great pieces of work from the same era to use linear perspective and illusion of space and distance, Da Vinci's Last Supper. I think it is interesting that although he worked with the same concept of spiritual entities as other artists of the time, however he wanted to step out of the traditional mold and apply humanistic and mathematical concepts. Do you know which major painters his work actually influenced and how?