Hmm, this is not accurate (or I don't understand what you mean). 100Hz CRT TVs available in the 90s/00s did not interpolate frames to get smoother motion – they only existed to reduce flicker. I think such TVs also existed in NTSC markets (120Hz)?
Anyway, ever since the late 00s, pretty much all the TVs you can buy from a store do come with an interpolation algorithm to artificially display a higher frame rate image (e.g. 100Hz/120Hz) from a lower frame rate source (e.g. 23.976/24/29.97/30/50/59.94/60 fps) – which (personal opinion) looks terrible (and can be turned off from the settings – but the default is always on). This is an interesting side tangent when it comes to motion blur, because the blur is prebaked in the input signal and cannot be easily removed. Thus, the end result always has an artificial look.
For instance, if the source material is shot in 24fps with the typical 180 degree shutter angle, each frame spans 41.6ms of which the shutter was open for 20.8ms. Then your TV interpolates that to be 96Hz or whatever. However, the individual output frames still look (or, with the added artifacts etc., mostly look) like the shutter was open for 20.8ms per frame. However, each frame now spans 10.2ms which is a shorter time than the shutter speed!