Isn't a trackpad essentially a touch screen? Non-Apple phones to that just fine. There's the tactile feedback, but even the old-style physically-moving trackpad would be better than what vendors have today.
Or even what phone manufacturers do with their screens. The problem isn't ability though it's cost. The market for laptops is seriously cost competitive and customers don't know if a trackpad will be good or bad until after purchased (with the exception of a few brands like apple).
