More light. That is the obvious first one. When you have a new garden window in your kitchen, you are really going to love how it brightens everything up. This makes every task in the kitchen easier on your eyes because it adds more light to see by.
A spot for festive decor. If you like to put out pumpkins, gourds, ceramic turkeys, baskets filled with plastic food items, cups filled with grain, or other Thanksgiving decorations, that garden window is the perfect place.
An area to ripen fruit. Your new garden window is the perfect spot to put a bowl of fruit to ripen. That fruit also makes a great decoration, if you don't keep it there too long.
More light. Just like that garden window, your new bay window will extrude out from the house and offer a way for more light to come in.
More warmth. Those bay windows are going to be much larger than your garden window, which means you're going to get more warmth coming in. Warmth isn't so hot if you're sweating in the kitchen, but when you're relaxing around the dining room table, those big bay windows are going to be a treat.
More space. Your new bay windows will come with some room to put dishes of food or give another area where people can sit and chit chat. If you fill your home with people every Thanksgiving, this can be a big help.