Ok, I'll bite...
As a veteran of a human home invasion encounter, I feel qualified to comment.
Can you answer my question about what pratical difference it means? I'd really like to know where everyone is coming from. All the moaning and wailing seems like a kneejerk panic reaction.
Yes. It is a stake through the heart of the presumption of innocence.
"A man's home is his castle". That phrase in one form or another goes back to the very first stone structures legally speaking. It was, and always has been considered a common courtesy to knock before entering a structure that does not belong to you. This has been part of the common law here since Jamestown.
When you are in your home, you are afforded certain legal rights and privileges that do not necessarily extend to you outside the privacy of your home or the curtilage, and in some place, your property. Even in my humble home, 3-5 seconds isn't enough time for me to get up out of bed, and get to a close enough position to be able to shout loud enough that I'm coming to the door, much less get to it and let someone in.
Because I have been involved in an encounter with an unwanted, uninvited visitor, I have made decisions that ensure *MY* security, and the security of the lawful occupants of my dwelling. I often here the phrase "I'm going home to my family at the end of my shift." We're talking about people who are IN their home WITH THEIR FAMILY.
A door being burst down, knocked open is an invasion, without the property owner's permission. Warrant notwithstanding, at it's base level it is occupying territory of another by force. That is an attack in it's least common denominator, which violates decency, public decorum, and as an act it is
malum inse. This decision says that agents of the state can simply enter the structure specified in the warrant and although it's "bad" it shouldn't mean that evidence gets suppressed. I don't know how you treat your uninvited guests, perhaps you're better at hospitatlity than I am...
I think that this decision is going to prove to be a WLM - Waco Like Moment(tm). Criminals will soon understand they can be "hit" at any time, in any place by the police. There will be significantly less incentive for them to "go quietly" since the constitutional protection against unreasonable searches and seizures now no longer exists. It's unlikely to affect me personally, I don't conduct my affairs in a manner that typically draws unwanted attention from the law - except when one of them slanders my good name by accusing me of exceeding the posted speed limit or the like... Still, to understand why a lot of people are offended by this, look at where this protection stood 100 years ago, and 150 years ago and compare it with today.