Honestly what I see shaped by the market is a move away from DIY systems almost completely, Only those willing to spend inordinate sums of money will be able to afford/build a system themselves. Desktops from SI's will be workstations that could also game. Corporate budgets will be needed to buy them and their AI feeding processing capabilities.
People will go more and more to tablets or portable devices with SOC's.
And I feel this is where Apple could totally step in with their market dominance and purchasing power and just take over the gaming laptop/non work laptop market. Partner with Steam, work with their OS/Gaming integration teams to get the compatibility later right. And sell a metric F ton of laptops and mac Mini Pro's as the best home use/gaming device out there.
Then they could sell it with Apple financing.. Get your top end mac... 4k, just bi monthly payments of xx dollars for 3 years. Or subscribe to our system refresh cycle for XXX dollars a month and get a new system every 3 years with all of the current tech. Apple iCloud included.
OR... you can get a top of the line system for free... but for x hours each evening you have to let the AI run from your system. And pay the power bill.