First up is the StartTech TB32DP2 ThunderBolt3.0 to Dual DisplayPort adapter.
5K 27" Dell monitor (UP2715K).
At $66.86, It's not cheap - but if you need it, buy it.
The second item is the Sonnet Fusion ThunderBolt 3 PCIe Flash drive (Windows Edition) (model # FUS-TB3-512GB-W).
The third item is from Sonnet's competitor, OWC, which has a similar product - the Envoy Pro EX with Thunderbolt 3, which will sport a claimed 1GB/s writes and 2GB/s reads with capacities ranging from 240GB up to 2TB. It's now been updated for 2017 and features heatsink fins on the sides of the case to keep it cool. OWC says the 1TB model will go for around $900 USD, and will go on sale sometime around July 2017.
Another interesting storage from OWC is the Mercury Viper with ThunderBolt 3. Internally, it has 4x SSD units (not sure if mSATA or 2242 M.2) in RAID, and it is powered via a wall outlet. It reaches scorching speeds of up to 2GB/s writes, and up to 2.3GB/s reads. It's got a flat profile and a nice light strip around the case for that futuristic look. Unknown yet when will be released and what would be the pricing on these.
The last item is the Akitio Thunder3 Duo Pro enclosure, which can accommodate a couple of 3.5"/2.5" HDDs or SSDs. It features a Hardware RAID controller (RAID0/1/Span/JBoD) and tool-less drive installation.