Very true, alas. That piece by itself is basically a paperweight. (That costs as much as a decent car.) Unless there are a lot more guts in the top section not visible in the pictures it almost looks like there isn't even anything "digital" in the console, it is pretty literally just a CRT and a bunch of switches.
Digging around I was actually able to find an ad for the non-Tandy-branded version in a 1976 ComputerWorld magazine. It really leaves me scratching my head as to why Tandy chose such an oddball machine to run with, but I guess "turnkey" systems were pretty rare at the time and that's what they wanted.