RS232 is more reliable, faster and offers more options. For example- there are a lot of displays out there that do not have separate (discrete) on and off codes, which are very important in modern theater systems. However a lot of these “toads” or “toggle only devices” have RS232 serial ports on them, with RS232 we can now discreetly turn the device on and off, further there a bevy of other things that often can be discreetly controlled like aspect ratios and user defined picture presets. The list is nearly endless. Most of the remotes that come with home theater components have only two purposes. 1 for the initial setup and 2 to make sure that there isn’t any room left in the end table drawer.