I doubt it has anything to do with travel trends anymore than GSk being there has anything to do with pharma. These are business executives whose specific domain of expertise is business, not travel or pharma or banking, etc.
Yes, but probably quite incompetently. And the Marriott board member probably knows how to make mediocre cup of coffee with the machine in their hotel room, but would be insulted if you asked them to make you a cup. But Microsoft has other experts who are competent to speak about those things (both enterprise software and good coffee), fortunately.
As a software giant Microsoft's products intersect most parts of most economies. A hotel chain has its own technology needs and has views of the technology needs of its customers.
Whether a high-placed member of Marriott has specific insights to Microsoft I don't know, but I don't think it takes much imagination to fill in hypothetical reasons the person could be helpful.