Usually an acquisition spells trouble for the product's users, but this is a different kind of situation. I think WooCommerce and Sensei will only get better as a result. The only folk who have to worry is the people building competing products.

Sorry if it was not clear. Sensei, along with all of other other plugins will remain and continue being develop as normal. No need to worry at all. We have a lot of exciting things coming up for Sensei ;)