I have a track record of making very accurate predictions, and I want to make a big point of what I fully believe the Project Helix hardware is. Also I want share with you the reason why i think I'm pretty good at making predictions is because I envision the business plan for the products before I think about what the product might be. I think that's important because that's how business actually works.
Anyway, I believe that Microsoft Project Helix will be two products once it hits retail. Everyone is expecting some sort of Desktop/living room PC that will play Xbox and Steam games. I'd imagine a device that upon boot up presents you with a list of your games across Steam/Xbox/Epic or the option to load into Windows 11.
You select your game and it either boots up the Xbox game, or it loads a lite version of Windows and opens your game via Steam/Epic. It's a graphically what you'd expect from a next gen Xbox with DLSS quality upscalers, full ray tracing support, and maybe even frame generation. This will probably be a costly box as it won't be subsided by game sales like a normal console. So anywhere north of £1200 considering the current increasing cost of hardware.
But what is the actual size of the target audience of this device? 10 Million lifetime sales at best? You are looking for consumers who have an Xbox game collection, who don't want to move to Sony or Nintendo and don't already have PC or have a fairly old PC desktop and are looking to upgrade. Many users have been left with a sour taste in their mouth over Xbox and trust in the platform is at an all time low, so personally I feel 10 million is actually VERY generous.
But hold on, Microsoft are entering into a multi billion dollar partnership with AMD. So are they really going to invest all this money into a device that will only hit around 10 million users at best? Of course not, and even the press release says this:

Plus how does just releasing one PC unit align with the mission statement of bringing Xbox and Windows together? What makes more sense would be to expand this device to existing PC users.
This is where the Project Helix motherboard comes in. A motherboard with the Xbox SOC mounted on it. PC users can still add in their extra RAM, their Nvidia GFX cards and their Elgato capture cards! But they will also have full compatibility with Xbox software. You want to play GTA 6 now on your PC desktop? Well get this new motherboard from Microsoft! That prospect alone will sell millions of units to PC users.
Now you actually have a device that brings Xbox and Windows 11 together. You solve many PC gaming issues by having standardised hardware, while not taking away anything from the PC gaming space.
Plus when you actually manufacture this Xbox PC units, all they really are is the Helix SOC Motherboard in various hardware configurations.
When you look at Project Helix in this light, then you have a much stronger business case. And when you have a strong business case, you are far closer to predicting what is going to happen.