I think Rob is right.
There's a lot of great design in the new Axiom amp, and I know they could do the same with a pre-processor. But I bet the details on a project like that are quite intensive and probably more than they want to get into. The amp doesn't require meeting and staying up to date with specification like HDMI, and codecs like Dolby and DTS. Also the Dolby, DTS require licensing aggrements and plenty of other legal details. It's probably not worth it to get setup for all this unless they are going to focus solely on this type of product.
Axiom has been smart by keeping with products that have some staying power, without the need for constant re-design and manufacturing. The amp falls into this category as it will see many pre-processors come and go in its lifetime.
These are just my thoughts. I certainly could be wrong about their plans here, and I would be the first to be 'pleasantly' surprised.
