Honestly, I have no idea how good it'll be. I don't know if I'll be blown away, but I'll have to put it through its paces on GameSpot. If it can do copy/paste and centering, it might just win. Sorry FireFox, but v3 just wasn't as good as 2. Besides, 2 had better themes :cry:.
But tomorrow I'm going to download it and hope for the best. Considering that Google does some very nice work, here's hoping!