Totally agree. Don't forget TV and monitor manufacturers have the risk of added cost when incorporating G-Sync, plus the fact that NVidia will not allow a monitor to support Free-Sync if it has the G-Sync label on it. No doubt Free-Sync isn't totally "free" to make, but a lot less than the $200 premium for G-Sync. Proprietary systems suck, even worse with contractual constraints!
I asked a credible source (whom will remain nameless) and he said that FreeSync has no added cost other than time. He also added he can manufacturer two FreeSync monitors (24", 1920x1080, 144 Hz) for the price of manufacturing one G-Sync monitor because the scalar he has to buy from NVIDIA costs as much as a monitor by itself.
Said differently, FreeSync has no extra hardware in the panel. The panel just reports its capabilities to the graphics device via EDID and then the work of doing variable refresh rate falls on the GPU to keep the frames coming at a pace the monitor can render. Even AMD GPUs have no extra hardware to make it work: just time spent there too in making sure the drivers handle it right.
TL;DR: FreeSync is a software solution (open standard); G-Sync is a hardware solution (closed standard).
I suspect Intel's new GPU will support adaptive sync too (probably branded differently) and you'll likely be able to plug a FreeSync monitor into them and they'll work as advertised. If Intel starts validating monitors itself, they may elect to use different branding (not sure how much of a grip AMD has on "FreeSync"). It could get confusing which monitors will work with which GPUs.