I find that many desktop sites scale just fine, and as you stated, the most common issue is simply that the elements may be sized a little strangely. The desktop sites tend to be way more functional. I miss my old Windows Mobile PDA with the stylus that could tap the smallest of links without a problem. With most phones I’ve had in recent history being at least 1920x1080, there’s no reason a site shouldn’t be able to display in desktop landscape mode.