If 100A is serving you well, I see no reason to go to 200A.
...future owners might want to add more equipment that would need it.
...is that your problem? And will that make the house more valuable?
...if you're changing out the panel anyway. The only additional cost (beyond the fact that a 200A panel costs more than a 100A panel), is changing the meter can and incoming conductors, and probably the service mast (conduit going through the roof).
Lot's to think about...lot of variables.