I think they stopped making separates a while back??
But then the hifi industry isn't probably at it's strongest - for most people my age (mid 20's) - having a 'proper' hifi system isn't something that people consider any more - more about having an iPod and tablet.
As for the demise of Sony TV's...I guess things come and go. Look at Iiyama who used to be top for computer monitors in the CRT days, now they just push out cheap flatscreens with no real selling point.