Compatible with iX?

The iTunes App Store is currently listing apps as compatible with "ix", or more exactly -- "compatible with iPhone, iPod touch, iPad and ix.Mac.MarketingName". That's almost certainly a glitch of some kind in the system and I expect Apple will fix it asap but it does make for a fun question -- if there is indeed an "ix" in the pipeline, what could it be? An app-compatible Apple TV? Cross-compatible Mac Apps? A 5 to 7-inch device? Something we haven't imagined yet?
While Apple sees to its stray text, give us your best guess -- what's "ix"?
[Thanks Ethan!]
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Rene Ritchie is one of the most respected Apple analysts in the business, reaching a combined audience of over 40 million readers a month. His YouTube channel, Vector, has over 90 thousand subscribers and 14 million views and his podcasts, including Debug, have been downloaded over 20 million times. He also regularly co-hosts MacBreak Weekly for the TWiT network and co-hosted CES Live! and Talk Mobile. Based in Montreal, Rene is a former director of product marketing, web developer, and graphic designer. He's authored several books and appeared on numerous television and radio segments to discuss Apple and the technology industry. When not working, he likes to cook, grapple, and spend time with his friends and family.