I didn't know that, cool. After doing some research it appears that the Philips device was never shown. It may have been on paper only. The Sony device was shown at a CES and we now know what became of it. The original PlayStation was actually 100% backwards compatible with the SNES.
The problem that Nintendo had, from what I understand, is the Super FX chip. The CD device didn't contain one. So the games for it would have been worse than Nintendo's Super FX titles. (Which was all the rage back in the day.) At which point it was determined that Nintendo didn't need CD as Super FX proved to them that they could continually adapt their cartrdiges with new technology where as CD could change the underlying hardware.
Such a big difference from the Nintendo of today.