This Grow & Stow Portland Pine ($449-$1,399, originally $719-$1,949) could be the answer to your Christmas-tree woes. By simply plugging it into an electrical outlet, the branches expand at the touch of a remote control button. The tree is available in five different sizes from 6.5 to 9 feet tall, so whether you have a smaller space or a grand room, you can get one that's sure to fit.