You can't upvote stories or even post anything. You can't log in either. Just spend all your time browsing front-page stories, reading articles and reading comments. Pure reading bliss.
HackerWeb displays a nicely threaded interface for comments. If there are too many comments on the page, HackerWeb intelligently collapses them so that you don't have to scroll like mad.
Hacker News doesn't show subdomains for domains beside stories, which may sometimes confuse readers. HackerWeb shows them and restores faith in humanity.
If the story contains a poll, HackerWeb will show a poll bar chart to visualize the points for each choice. Way better than just plain numbers and text.
HackerWeb silently auto-updates itself to the latest version and you won't even notice it. No interruptions, no prompts, no action needed.