Bonkers real estate prices in NC are probably more about people cashing out of higher-price areas and coming here now rather than any future Apple development. I think the Apple (and Google) moves to NC have some impact it's just that NC is attracting a lot of movers from CA, NY, and FL already. Check out:

https://www.ncdemography.org/2023/02/08/where-are-north-caro....)

This says 366K people moved to NC in 2022. That's a lot of folks who come here and probably a bunch are trying to buy houses in the RTP area.