If you ever want to remodel the kitchen, bath, or upgrade anything, you'd probably want more room in the panel than a typical 100A one would provide. Now, you may not need more actual power capability, but generally, you'd use a larger supply on a larger panel (you could always buy a 200A main panel, but substitute a 100A main breaker to match your supply). Most modern kitchens have all sorts of power devices: microwave, frig, stove, vent, dishwasher, the counters, garbage disposal. Now, they all don't need their own dedicated supply branch, but many of them are recommended to have them by the appliance manufacturer. It also makes life easier when it comes time to do any repairs - you can shut only that one thing off while you deal with the problem without impacting potentially numerous other things. Modern codes often require more circuits, but replacing the panel would be grandfathered, most places meaning you wouldn't need to run new circuits unless you were also remodeling say the kitchen. It would be nice to acutally have the space for them, though.