Do these then run off the lynx express (current coop) or? Wondering what all someone would need to buy to bring the magic?
No. They use a dongle (must be dedicated to Smart Strings; ~$45 if you don't have one), a hub (which handles power injection and splitting and also outputs DMX; current design handles 16 controllers; future designs may be for more or less; the 16-controller version is estimated to cost around $30), an ATX power supply (anywhere from free to $50) and a controller (around $8), which can handle up to 128 pixels.
Smart Strings are about 40 feet for 128 pixels, or about 3.5 inches between pixels.
Just for grins, let's say you want to replace everything except your two trees; that would be 490 pixels (so let's round up to 500):
*Pixels themselves: $325-$375, depending upon shipping from China.
*Dongle (if you don't have one): ~$45.
*Hub: ~$30.
*ATX: ~$25.
*Controllers (need at least four, though your topography may require more): ~$32.
*Cat5 cabling: ~$25.
If my trusty calculator is correct, that would be right around $500. Final pricing may be wildly different.
YMMV, not valid in all 50 states, this does not imply or warrant a guarantee; it is, in fact, a wild-ass guess on my part and I could be off by a factor of 100-200 percent.
\dmc