Large Format Gaming Display (LFGD) Upgrade
NVIDIA's new Large Format Gaming Displays are my new favorite gaming monitors, having personally used the new ASUS ROG Strix XG438Q for a few weeks now, I'm in love with the larger 43-inch 4K 120Hz G-SYNC gaming monitors.
ASUS prices its ROG Strix XG438Q at $1280 but you're getting a 43-inch 4K 120Hz gaming display for that, where the 4K resolution actually feels great to use in a game -- versus the far-too-small 27-inch 4K high refresh rate (120/144Hz) gaming displays on the market. I feel the 43-inch size is actually kinda perfect if you have it at a further distance than you would a 27/32-inch display away from you.
Big Format Gaming Display (BFGD) Upgrade
For the serious enthusiast in your life, and if you've got the budget to handle it -- would be a Big Format Gaming Display. The BFGD is the peak enthusiast gaming display, offering a gigantic 65-inch panel at native 4K and blistering 144Hz refresh rate. Yes... 65 inches at 4K and 144Hz -- this is a TV, and it's a damn big and fast one.