Yes, I realize the one picture is not as new construction. But with those size limitations. I feel like it then puts Two verticals close to the corner instead of One in the corner, and I don't think it really improves the view, it's not like opening the corner prevented blocking the Eiffel Tower or anything and the skyline is actually blocked on the left. I think it ends up as a "look what I can do" sort of trick that isn't worth the effort. The second picture with the big expanse of a single pane of glass may well be worth the expense if you have the budget. that is the true sort of voided corner that International Style architects were all over. The corner slider is the sort of thing that will get less expensive with economies of scale, and may in fact, have a positive impact on how those rooms actually work in an inside/outside blurring kind of way. For my money I would probably want the fixed glass panoramic thing unless I lived in a perfectly temperate climate completely without flying insects.

WOW big difference in pricing. I need to see the house style and you need to provide more info. Waht is your style ? Wahta re planning for the interior of the windows .IMO no matter what do not ever get interior blinds for sure.

Virgil and Joy, thank you so much for your input, for the informative link, and most of all for reassuring me that white baseboard and casings can be used. From Joy’s link, this home with the floating stairs (we will have 4” white oak threads with black stringer) resembles the modern home we are building. If 6” baseboards are used, then door casing should be 3” or is there another dimension recommended for a modern look? Not certain what is used in this photo.

1 x 4 Flat Stock and a 1-1/8" Pine Backband. Easy peasey. That looks more like a 1 x 6. It's basically a craftsman type look. There may indeed be a bead on the inside edge of the mouldings. I don't think there's a bead. I think it's just the trim on the inside edge of the window. Similar to below. BTW: these are 1 x 6