PC costs aren't that bad. Yeah, the entry is higher, but if you buy good parts then you'll only need to upgrade the GPU mid-life.
By the time it's time to build a new system, the console users will be presented with a new system to buy anyway.
Here's the thing though... You can still use your older PC hardware for as long as you like. Console users HAVE to buy the new system to play the lateset games. PC users don't. If it works then why upgrade? That's why I'm still using my GTX 960 4GB. Only ever considered a budget card but it still offers slightly-better-than-console performance.
People who complain about endless upgrades for PC "every six months" are the ones buying trash parts that are already totally obselete. My system is not that, hence I enjoy ED so much on PC even after four years of running the same system.
So much for upgrades "every six months"... Only upgrades I've made were cosmetic. An overkill CPU cooler and a fancy case, plus a network card for high quality WiFi.
PC is an acronym for "PERSONAL COMPURTER". Though one can be utilized by anyone in one's house hold, it's generally never is. If and when one needs to be upgraded, one has to have considerable amount of knowledge as to exactly what needs to be upgraded. I'd veture to say, that most wouldn't have the slightest idea as to what componets they have to upgrade and which items are better than other's. Consoles were designed to be utilized by one's entire family, though everyone can have their own device, if they are the same, one only needs one account, which can be shared by everyone in the house hold.
If and when it can no longer play the most newest and most current games available. One simply buy a new one and plugs it in. Unlike a PC, no knowledged of how to get and install new driver's and such is required and no tools needed.
Rather than allowing a console to utilize KB's and Mice, allowing a third party mod or program or what ever it is called such as "VOICE ATTACK" which would eliminate the use of either hand for most game play thus a better option.