Word from G3 is they designed ION screw pattern (and mounting position on ski) to have the least overlap possible with existing tech binding mount patterns. Moreover, the layout is wider than most tech binding screw patterns.
ION pattern is 40 wide x 45 long (mm) mm at toe and 36.5 x 52.5 long at the heel.
Major brand popular tech binding model is 30 mm wide x 40 long at toe, and 32 mm wide x 53 long at the heel. That may sound like it’s still close, but ION appears to place the screw holes in significantly different positions once the boot is matched to its correct position on the ski — thus preventing overlap if you want to change binding models/brands or buy used skis with the ubiquitous tech binding screw holes. (I’d make a graphic comparing the two screw patterns, but it would be misleading since they end up quite differently in terms of fore/aft, depending on boot size as well as optional adjustments in fore/aft binding position.)
For those of you concerned about how wide your binding mount pattern is, note that ION is significantly 10 mm wider at the toe, and insignificantly wider at the heel.
If you want to play around with ION mount pattern (or mount IONs once they’re available), here is the link to our WildSnow ION paper mounting template.
ION will be available at retail this coming fall of 2014.