For some fruit trees it can be bad. My berry bushes and coming earlier than normal, but they're cold hardy enough that they should be fine. Trees though that are mostly cold hardy but not usually budding now can be completely killed, or at least killed back to the ground to have to regrow up from the roots. If it's flowering early, there's a decent risk of losing all the buds and getting no fruit this year. People might need to cover trees they don't usually need to.