Web based POS will not work!

Web is emerging as application platform and many common office services are now moved to web. However there are places where desktop applications win! Let me focus some points why web does not work in POS, especially restaurant POS

• Web pages (that's just what Web applications are inside a browser) run under a lot of restrictions. They cannot read files - leave alone writing to files from local PC. Biggest demerit of Web application is it cannot easily control required hardware like POS printer or Cash drawer.
• Web cannot handle printing easily. Its not wise to say impossible but its cheaper to build Application that can handle individual Printers and also generate reports.