I think the window trim should match the other window and door trim, and baseboard, in the rest of the house. The cabinets are like furniture while the trims are the house.

Some whites and creams go beautifully together. Some combinations just look dirty and muddy - this I know from a disappointing experience in my bedroom! Our kitchen cabs are creamy, and we painted the whole room, except the ceiling to match, including doors in the room, trim, walls, windows and had blinds made to match. Like you, I was worried about the rest of the house trim and doors, which is white. But it's absolutely no problem at all. It doesn't look weird, liked I feared it might. Maybe it's because the whole room is basically the same colour. If you do a search, I think you'll find old threads on this subject.

Get bronze windows instead of white and you'll never have to worry about trim color working with the windows. If you're locked into white, then you are. I know that happens. But working with a white window is 1000 times more challenging than bronze and if you can avoid white vinyl, it's a good long-term plan.

Things feel dated when they were done by everybody without regard to their space, just because everyone was doing them. If you love creams, always loved creams, and the house you build will look great with them, given its location, style, your concept, light it gets, etc-no, won't look dated. Colors by themselves can't be "dated". They're too independent of us:) Only our impressions of combinations of them, our perceptions etc, that are usually very personal, can make them feel dated. So, to summarize.. No:) Use whatever you love and whatever your house will like most.