Riot believes that there are "too few sources on the map for tactical depth," so they've added some.
Here's a plant that will provide vision for both the dragon and Baron pit when struck.
Got a Karthus ult headed your way? Walk down the river and grab some Honeyfruit! This will probably be the most impactful of the plants, because not only does it help a jungler stay in the jungler, it can give you an incredible advantage when you're already ahead in lane.
The team who controls the lane will control the Honeyfruit.
If I was a Ziggs main, I'd be a little salty, because now everybody has the utility of a satchel, but only in two spots. This plant will be nice for both invading and escaping. Stealing Raptors? Grab a couple and then use the Blast Cone to get away!
These plants are going to make League of Legends a completely different game, and it's one we're excited for.