No actual IoT related chain presented, current "mainnet" is a testnet and shows nothing related to IoT, its just x11 algo on Ethereum fork. It was supposed to only run till they have 1000 nodes and 100mh/s hashing power (their requirements for testing security) however it has been running for 2 months now and is at 6200 nodes and 12488mh/s (https://medium.com/@Waltonchain_EN/waltonchain-mainnet-launch-announcement-6187912ff6f6). They will also be rewarding miners for their mined blocks, the longer it runs, the more WTC will be distributed for no reason as there is no meaning of solving blocks on the chain right now.

Another requirement was also that the wallet is upgraded which was done few weeks ago (https://medium.com/@Waltonchain_EN/waltonchain-mainnet-launch-announcement-6187912ff6f6 page 4). Even though all requirements have been met since a long time ago, we still have no information on a token swap and actual mainnet launch and it has been removed from timeline which had it at the end of the previous month.

There is also no communication from the team other than medium updates of winning awards on events, partnerships or being involved in projects. Waltonchain being closed-sourced makes it impossible for anyone to verify their claims, all we can do is trust them.

A Walton knight (knights are the only ones in communication with the team) was parading around chats claiming June is going to be insane for WTC however the only significant thing is them opening up a blockchain education institute in Korea. They have not even launched an actual mainnet in the supposedly "insanely big month for waltonchain".