Not their goal. They have RCA for the low end (random cheap TV or text monitor connection) and HDMI for the high end.

They have no competition. They are going to sell out, again and again, for at least a couple of cycles before the competition kicks in. The hobby end will push for as many discrete components as possible, because they are easy to play with, but the core geek drive will be to shrink everything into a single tiny die, and minimize the bulk by limiting the connection points (which will be the major push in size).

In a year or 2 there will be a couple of manufacturers, and then the price and size will be driven down.

Give it another 2 years of design and production, and it'll explode. At that point you will have tiny computers, running off solar cells or vibration->electric generators, using wifi (or whatever is low power enough) meshes, cheap enough to sprinkle around like fairy dust.