Unless Lighthouses are super-seeded by inside-out tracking in all kinds of common household light settings at comparable precision, for the VIVE the thing that

Unless Lighthouses are super-seeded by inside-out tracking in all kinds of common household light settings at comparable precision, for the VIVE the thing that needs an upgrade the headset (with a flip up style option for casual use), which will also result in a new non-HDMI connector box, you could still keep the controllers plus the lighthouses. Also shipping the headset only, should be less pricey than it was on that comparably huge VIVE box set. I'm quite confident there will be room-scale enabled (foveated) 4k resolution class headsets in the next two years for $500 or less. Although the money saved will then still have to go towards a more capable GPU than something currently available in the $200 price range.