I've been playing a lot of mobile games lately but they are too oversimplified aside from a few exceptions that actually work better with a tablet.
Well, there are some pretty amazing games like Assassin's Creed: Pirates or GTA:SA that are pretty detailed but the controls simply ruin the experience.
Yeah I think that is what happens with ports and I've never been too fond of onscreen controls anyway so if I got those I'd probably just buy a controller. I have some nice games that I think work better with a touchscreen though, thankfully.