your TV example is in favor of ps4.5? New TVs come out every year... Not many ppl buy new TVs every yr, because their TVs still work just fine. It's gonna be the same with PS4.... It will still work! So the idea that it negatively affects the longevity of the OG PS4 makes no sense...
As far as ppl waiting for the more advanced version... The majority never do that with consumer electronics, why would they start now?
Not remotely the same. Most differences between TV models are minor at best, especially if you were savvy in your initial purchase in the first place. In-fact, my 2008 Pioneer Kuro is still one of the best TV's money can buy, despite now being nearly a decade old. The only reason I even bought new TV's was not to replace my older one, but because I had more rooms I needed the new TV's for. Even then, I can't see myself replacing neither my Kuro or my VT65 plasma till one of them dies.
Consoles are a different kettle of fish altogether. You buy them because they're a fixed, convenient platform that you hope will give you years of software enjoyment before they lose out on being the primary focus of that platform, and new hardware is released that takes away the limelight. Iterative console releases change that dynamic, and will inevitably divide the time and budget of developers and studios between the vanilla and upgraded versions of the hardware. Add to that, unlike say TV's or mobile phones, I feel like the differences will be more notable despite the shorter time frame between releases. But we shall see.