I’ve seen dimmer compatible LEDs and, even better, LED bulbs that have built in control of light intensity and even color. I’ve even seen bulbs capable of playing music through bluetooth!
Shape I don’t really see as a concern, as any shape an incandescent bulb can be produced in, a LED bulb can also be. And then some, as the LEDs can be set up, twisted and bent into some very imaginative shapes and angles.
And heat is not ready a concern. You can touch most LED bulbs with your bare hands with no risk of severe burn. Unless very high wattage is in play, at most, a LED bulb will be warm to the touch.