the way i see it, this console of yours will be like the apple computer in a wooden case. if some important hardware people notice you and will want to finance manufacture your console, it will become like the apple II computer lol.
by the way (i might have missed this earlier in the topic so kill me if you have to

) , this console, like what level of gaming are you aming at? 2d? 3d graphics? what kind of controllers will you use? and what are you gonna base it on?
i actually reccomend making your own linux distro for the OS of this console and the games that are developed should focus on open GL because its a really underrated rendering system that needs more attention.
YO! i just remembered something Instead of using linux. you should use BSD! BSD is like super linux- father of linux call it what you want. but its just as good as linux (well its built on UNIX) and the thing is, while lot of software from 1 linux distro (ubuntu for example) might not be compatible with another linux distro (debian for example) 90% of all linux software from all the distros is compatible with BSD. Apperentley with BSD its even easier to make your own distro. Also there is a mode of BSD installation. where it will scan the hardware and build itself into the hardware (like it makes its own drivers just from what it learns from the hardware) you can also write your own drivers of course. you can modefy the GUI any way you want- like not just skin the gui, but change it around, make your own uniqe setup, have the start button placed in the middle of the screen change the way menus work and the whole structure of the gui all that good stuff.
finally from what i hgave been told, BSD has the best tech support among all unix operating system. Because linux is pretty popular, most of the croud on the forums, are these 12 yearold geek wanna bes and people who just used it for a long time and some people who actually know it. BSD support is fewer in numbers but it is exclusivley certified BSD professionals, who dont screw around. and will apperentley help you a lot
also if you learn BSD, you will master all linux systems and you will be more hardcore than those nooby linux users because you know BSD!!! you will be like this-->
I dont know anything about unix based OS all i did was use them a little, but a friend of mine is into BSD and he wants to be certified in it soon, so he got me into the idea of learning BSD whenever i get around to it.
so im just throwing out some ideas for the future. you should seriosley consider it. because writing your own OS for a gaming console is a pain in the ass. last person i knew who tried writing an OS. after a year, all he was able to do is make his laptop boot his modified unix kernel
dont hate people who rip you off,cheat and get away with it, learn from them