There are plenty of smart home gadgets being showcased at CES this year, but frankly, I’m most excited by the prospect of autonomous lawn care. Luckily for me (and my poor neglected garden), both Moen and Rachio are releasing new smart irrigation gadgets that can be used to remotely control watering locations and frequency in your yard, helping to keep plants healthy while reducing water waste. And only one of them actually requires you to already have an expensive irrigation system in…