I don't like the design of the 220/620. Looks like they're trying to appeal to the soccer moms / fitness market.
The market right now is being shaken up by startups (pebble), sports companies (Adidas just came out with a GPS watch incl. HRM without (!) chest strap, the fitbits etc.
Garmin can't ignore this much longer. They gotta come out with a GPS watch that syncs via Blutooth 4, can take your HR without a belt and has a high rez color display.