I don't have HUD in my cars, but I rented and test drove cars with HUDs, and they are great, but may be not all $1000 great. Having the speed and the navigation arrow in HUD IS a lot nicer than having to look down in the dash, but won't change your life. However, the HUD in the i4 had 2 more attributes that I think make it worth the price: 1) it can be configured to show information that you want and complementary to what is in the dash, e.g. show the direction to go while the dash shows the driving assist with the 3D view of the cars around you and the center display gives a bird's eye of the whole trip; and 2) it can even be configured to show navigation from Apple CarPlay or Android Auto (per BMW, I haven't seen a demo).
In Texas where 2 of my cars were totaled by stray wild deer, having the Laserlight that illuminates 600 yds out instead of the typical 300 would be worth the $1,000, especially if we can trust BMW to OTA the advanced "Selective beam" features once the archaic headlights change in the US (the Infrastructure package signed into law by Biden yesterday finally orders the NHTSA to revise its rules to allow adaptive headlights) - the demos in the internet show it can stay on high but selectively obscure small cones to avoid blinding other drivers.