It clearly has its uses in certain circs(like how you were wanting to view that loooooong list in the golf market, if the bitch would work properly and fill the damn screen
) but I wouldn't like to be using it as a standard position. But the problem re your main issue is websites are naturally being optimized for what is a standard size/res. Your monitor is beyond the norm. And we can hardly expect betfair(of all sites) to go out of their way to ensure compatibility with larger screens.