Mine idea is simple, basically look at what Polar is doing and do the same or improve on it.
They are updating every month with new ideas (best mate has one and tells me everytime there is something new)
Reminder notes at a certain distance or time eg. 10km hits "Have a gel pack" or "Keep it up"
You can upload your run or ride with Polar and it displays as a cool little video using google map images to show locations as well as showing max speed max elevation total time etc etc in a 60 second video
Recovery advisor actually tells you how you should be feeling rather than a number of hours until possible full capacity.
There are plenty more things like this that polar has improved on, for something like Garmin I feel we should be ahead of the pack not behind.
I tossed up between the polar and the 920XT for ages and am semi regretting it at the moment, hopefully this changes.