The processor is a 1 ghz via.
It ships with XP home. The Infill isn't suppose be just another car head-unit. It is suppose to be a full fledged computer you can run in your car with all the flexibility and and upgradibility that comes with that. Embedded was considered, but to realize its major benefits, HORM and a locked down OS, you have to have some major draw backs that were not seen as desirable for the MP3Car market. XP embedded is taylored towards appliance like devices that have a specific function set and that function set can't be changed too easily by the end users. If you want to install any non-supported USB device or install any new software, your basically SOL with embedded. We still want to do the car computer thing with the Infill, its just we want to make it much easier to install, not make it exactly like a typical head unit.
The Infill also has very good power management system so it can standby for a couple of days and will go to hibernate if it detects a low battery so its already faster starting then what HORM could bring, but the biggest reason is still just upgradability.
Given the price point of the Infill, even without any software licenses it still would be ~$2k and that would be for a product that did nothing out of the box. That price basically puts it out of reach of a lot of the typical MP3Car users hacking together thier own software solutions running on thier old computers. The hardware is also not standard so only software written specifically just for the Infill will work with it. Generally speaking, the people who want to install and configure every piece of software from scratch are the same that also want to do all the hardware from scratch, in other words not a person that the Infill would appeal to. In any case, if you don't like StreetDeck, nothing is stopping you from installing other software on it.