The technology you refer to has not changed since 1975.
It is a stretch to call this smarthome technology considering the ban on incandescent bulbs, which completely eliminate X10s ability to dim or fade bulbs (because you are using CFL, and if you use a x10 dimmer on a CFL, you can burn down a house), and writing any sort of logic based on whether the device is on or off is not possible.
Now Insteon supports bi-directional communication and you can determine state, but you are looking at $45 per outlet or switch versus the $8 X10 stuff.
So, yeah, still out of most people's price range, unless you want to settle for over 30 year old technology.
It is a stretch to call this smarthome technology considering the ban on incandescent bulbs, which completely eliminate X10s ability to dim or fade bulbs (because you are using CFL, and if you use a x10 dimmer on a CFL, you can burn down a house), and writing any sort of logic based on whether the device is on or off is not possible.
Now Insteon supports bi-directional communication and you can determine state, but you are looking at $45 per outlet or switch versus the $8 X10 stuff.
So, yeah, still out of most people's price range, unless you want to settle for over 30 year old technology.