Lutron just came out with a Zigbee-based Pico remote, which may or may not be supported yet, but stands a good chance of support in the near future. I would prefer these over the Clear Connect based Pico remotes in new installs. (I would prefer non-Lutron remotes over both, just to support companies that embrace open standards).
(See Lutron Connected Bulb Remote)
I’m working on a massive teardown and reengineering of the Wink Hub as a Lutron bridge that will enable SmartThings-Lutron integration as well, but I very much doubt ST, Wink, or Lutron will like me distributing that beyond my own personal use for my Caseta Wireless system.
And then some of us are also awaiting this: