It isn't worth arguing over it, no, but then it isn't worth posting if all you have to say
is that the last generation of CRT was "nearly flat," either. That falls under the no **** Sherlock file and doesn't add anything we don't already know.
Could be many reasons it wasn't pursued. Honestly, just seeing how the "slim" and "super slim" CRTs perform at much deeper than 2cm thickness (terrible, where uniformity is concerned), I couldn't imagine how these tubes described in the article would even function. At least, not as a CRT. Nor with any means of deflection as we know it on established CRTs. For all I know the article writer may have been describing plasma screens, confusingly naming it a CRT for its similar technology (sealed spaces, phosphors that glow, etc.). Even if it is in fact a CRT that is being described here, it's also very possible they just couldn't make it work to the kind of quality that a production would require.