That exists today. They're called laptops.
That logic is inherently broken. Laptops are designed to be compact, lightweight, and have been continually pushing boundaries, which is only possible by NOT being standardized.
Since there is no *TX form factor in laptops there is no standardization, and that leaves all of us stuck at the mercy of being forced to by some junk clam from some provider instead of being able to buy a laptop case from Lian Li or Inwin, a laptop motherboard from Asus, memory from Crucial, a power supply from Seasonic, and a Samsung laptop monitor that fits in the screen housing of the InWin laptop case. (BECAUSE: If the motherboards were standardized, that would then force a standardization of laptop monitor sizes and internal laptop monitor plugs)
I do not own, nor do I desire to own, a laptop computer, so I could care less, and my reasons have NOTHING at all to do with standardization, and everything to do with form factor and performance.
Incidentally, why are you putting an asterisk in place of the A? The original PC standard was called AT, which comes from the IBM PC/AT. X merely stands for extended, and was introduced in 1995. I remember it fondly, as I was VERY sick of the problems that the PC ATs had, which caused me many headaches as I was trying to make things work that weren't necessarily intended to.
You are advocating the actual death of the build your own PC. None of this exists without a standardized form factor and the laptop is proof of it. There isnt any reason for Fractal Designs to create laptop cases - none at all. The popularity of laptops is NOT enough. There must be a motherboard standard.
That's absurd. I never said eliminate ATX. I am advocating for newer standards to compete with ATX, and ultimately supplant it, but still be built around components, and interconnects.
Just go buy a pre-built from Puget or Falcon or HP and leave us alone. We like building our own machines using parts from 18 different providers.
I have not purchased a pre-built PC since a Compaq in 1987. IN the intervening years, I have built probably 30 PCs for personal use. I have had laptops, but they were all for business purposes. All my personal PCs were desktops, as I much prefer a large display, full-size keys, a proper mouse, etc.
A standardized motherboard also does not exist for tablets - which sadly also prevents build your own. Good luck buying your own tablet case from NZXT or Crucial!
I have no idea why you even assume everyone wants, let alone needs a laptop. I am retired now, after over three decades as a Computer Systems and Networking Engineer, and have absolutely NO desire to ever SEE, let alone USE a laptop.
You don't know me, my background, or anything, but with your condescending attitude, I feel like I know your type. In all likelihood, as I first got into personal computers as a hobby in 1977, when I was only 12, building a Heathkit H8, and didn't start my IT career for another decade, I have been doing this longer than you have been sucking air in your pie hole.
Anyhow, thanks for playing.