Compared to the 80/20 VDSL I had before, browsing is pretty much the same. The difference between enabling and disabling adblock is far far greater than having 1gig.
Uploading files is generally a lot quicker.
However, most internet services can't handle it. I rarely get more than 1-2mbyte/sec to bitbucket or git for example, which is annoying since that can be painfully slow on large repos.
Even worse, hard drives struggle to keep up with high internet speeds. SSDs are fine, but considering how quickly you can fill even a large SSD you don't really want to be using them for giant file downloads which can take advantage of it.
Finally, WiFi really can't deliver 1gig or anything close to it. I often drop back to 2.4GHz WiFi in some areas of my apartment and that is by far the biggest drawback.
So really, you only get 1gig or anything close when you're on a very fast server or protocol, downloading to an SSD on ethernet.