lets think from a clean slate for a second.
What would be new?
What would not be new, is a screen with the computer in it. Be it 24", 27", or 30". Or even Retina. Really, that is just more of the same. With Ivy Bridge. Big deal ...
So ... lets get inventive ...
How about a notebook thin screen, and just a screen?
The keyboard has the CPU in it. Its also a thunderbolt dock.
The graphics card is in the cable that goes to the monitor (thunderbolt of course).
Want SLI screen performance? Use three cables with graphics cards in them. The cable is wide and has open ends, and uses invection cool air, that flows in one end, and warm out the other ... and a fan on one end perhaps. The cable changes colour, according to the air temp that is flowing along it.
Want more CPU? Buy an iCpu (not Ick Poo thanks although that's what all the Windoze Wannabees call it these days) keyboard extender. Yes, they have a CPU in them. Buy a couple if you like. They sit on alloy cooling grids. Their cooling pipes change colour as they increase in temperature as well. You can add cooling cables to them too.
And you can have an iProj projector if you want - instead of a monitor. Or transmit to a television set. iTV that is called I think. Or should i say iThink (getting confused now) ...
- or wait for the comping iWrap ... you know ... its the "Foil in the Coil" ... remember now? ... it's clear mylar film, that you carry wrapped, like a paper towel tube ... you unfurl it, attach it to wall on its stick on battery holder, or to a table top - batteries on the table - and bingo! there's your clear monitor ir idesk ..... I'm wrapped in iWrap (waiting for it keenly I mean. iMean, i mean ... iMeen (I am mean, yep ...)
getting more confused again ...
Or get the new iHolo. You know ... its the hologram viewer. Its bigger than 46" if you want, but over 36", you need to turn the lights down a smidgen. Or say says Apple. We don't, because we charge couple our air at home - 'coz of our new air iConditioner ... yep, its a full "6Dimensions" air conditioner, from non other than Apple.
There's an iholokey as well (the holographic virtual keyboard - which auto adjusts to your hand size). Its even got "Keep Fit" option, that builds your biceps as you type. And you can upgrade it to any musical instrument you like ... just use iTunes, for every instrument there's a charge. Buy a deluxe Fender, and Jimi Hendrix will play alongside, and until July, buy the Stratocsaster, and Jimi will personally (his iholograph that is) will personally teach you its tricks. And if there's teens or kids around, he'll be straight and clean too, not even any alcohol in him.
And for those on a budget, just buy an iGlass. No - its not the "telescope" as Windoze Wannabees now call it ... It's a pair of the blue ray OLED glasses, with 4 million colours per eye, which give you higher resolution than the latest Retina ... and actually your own Retina for that matter ... also of course, 3D as well ... and surround sound of course, for the "Pro" iHoloPro.