My current setup...
I want to add... motion sensors, for example so the kitchen lights (Lutron dimmer switch) turn on when I walk to the kitchen. An Echo Show for its home automation control and browser for Hubitat dashboard.
Advice? Thoughts? Suggestions?
Oh I also have a Roku TV (TCL), a regular TV with external Roku in the bedroom, a PS4, and a Denon receiver with Spotify Connect. Would be great if I can control any of these with the Hubitat.
Hubitat doesn't officially work with Nest and I'm not sure if any of the un-official integrations still work, but other than that, it looks like you'd be good to go with Hubitat...and primed for expansion if motion sensors are your next endeavor. 
You can keep the Hue Bridge and integrate the lights (and groups but not currently scenes) with Hubitat that way; technically you can also directly pair bulbs to Hubitat, but that tends to be a bad idea for reasons I won't bore you with. As you've discovered, the Lutron Pro Bridge allows access to Lutron switches/dimmers and (my favorite!) Pico remotes. Alexa integration is handled via an Alexa Skill (or an older method if you're not in the US or another market where the Skill is supported), so that plus a Hubitat Dashboard are two ways to allow for manual control of devices. If the Kwikset is Zigbee or Z-Wave (and on Wink I imagine it is), you should be able to pair it to Hubitat.
I'm not into controlling my minimal TV watching with Hubitat, so I'll let others chime in there, but aside from unofficial Harmony Hub integration (I think?), I'm not sure what else is there.
If you do jump over to Hubitat, it sounds like your next stop is shopping for motion sensors. As you're probably aware, your main choices here are going to be Z-Wave or Zigbee. In my experience, Zigbee sensors tend to report motion a bit faster than Z-Wave, so if you intend to fully automate your lights, I'd say they're a good choice (though Z-Wave is fine if you don't mind the slight relative delay, and many of them have more configuration options than Zigbee sensors). In my opinion, the 2018 SmartThings Motion Sensor and the Sylvania Lightify motion sensor are some of the best currently available sensors (but if you search eBay, that one seller may still have a lot of 10 Iris v2 motion sensors, model 3326-L, left for pretty cheap; otherwise the Sylvania one is pretty similar in a slightly boxier form factor).
You can use the built-in apps (automations) like Motion Lighting to make these sensors with with Lutron and/or Hue lights--any switch/bulb/dimmer Hubitat can otherwise control. Your desire to automate will undoubtedly spiral out from there.
Your Kwikset may work directly (has an official integration). Below is the Hubitat site of compatible devices. You can sort by the columns to make it easier to find either functions or manufacturers.
"List of Compatible Devices - Hubitat Documentation"
I moved a year ago, but have stayed here to support some apps and dh's I wrote early on.
What did you move to?
@paul4 The Lowes Iris v2 sensors were made by Centralite and are some of the fastest and most reliable Zigbee devices ever made. Grab some of these from ebay before they are all gone. You'll save quite a bit of money! (Note: The seller accepts lower offers than his buy it now price. Never hurts to try!)
And you're going to need some decent Zigbee repeaters, so why not grab some of these outlets that repeat both Zigbee and Z-Wave? (Pairing the Z-Wave repeater side can be a little challenging...)
OOPs. Lost my place and thought I was on SmartThings. I moved here from SmartThings.
Would I need Zigbee repeaters in a 1000 square foot condo? The walls are concrete but I haven't had any issues with reception on any of my existing devices from one end of the condo to the other.
I would personally add at least two repeaters, strategically located. They are the foundation of a strong mesh network, and will greatly increase the number of devices that can be used with the hub. I have about 5-6 spread throughout my home and now never have any problems with Zigbee.
You can just add two IKEA TRÅDFRI outlets. They will stabilize your mesh and it’s only a $20 investment. Zigbee 3.0 and compatible with all the other Zigbee devices out there. So far have not heard anyone complain about their compatibility. They’re even compatible with the not fully compliant Xiaomi devices, and will keep them stable on the mesh.
Download the Hubitat app
