What's really the point of using a hardware wallet?
For security or not even... lol
Always used cloud wallets,thats why

It is really for security.
If you have your wallet on your computer, and the hard drive fails, you will lose your wallet. If you have a wallet online, and someone hacks it, you will lose your funds (if you don't control your private keys, you do not control your coins).
Hardware wallet mitigates those two shortcomings: you control the private keys and you have a backup, in form of a mnemonic seed (chain of random words in a non-random order), written on a paper.
Then you might ask, why not use a paper wallet instead? Well, spending out of a paper wallet is unsafe, as you will have to enter the entire private key somewhere whenever you want to spend your coins. On the other hand, spending out of a hardware wallet is very safe, as it isolates your keys from everything. Keys never leak and therefore your funds are safe. Hardware wallets also increase physical security; they are protected against unauthorized use by PIN+Passphrase. Paper wallets cannot do that.
Tl;dr: Hardware wallet like TREZOR combines the convenience of a computer/software wallet and the safety of a paper wallet.