Huh? Apple TV is $149 for the 64GB version and $199 for the 128GB version. Where do you get "hundreds/thousands of dollars" to replace your $49 Roku device? Who told you Apple TV was so expensive?
Oh, and the Apple "Pencil" ... I remember Steve Jobs saying if Apple ever delivered a device with a stylus to run the other way. Heresy! (Before I go further, I really could use a fine point stylus for my iPad mini. Getting my old, fat, arthritic fingers to press any "button" on its screen is an exercise in futility.)
You are misunderstanding what Steve Jobs was talking about. At the time Steve was making that comment most touch screen phones REQUIRED a stylus to accurately tick off boxes or make a selection on the tiny screen to even work. The screens were all RESISTANCE screens and not very accurate at all. A stylus was necessary to make choices on those screens. Styli were easily lost. . . at which point the screen was effectively useless. Steve pointed out that we ALWAYS had our fingers with us and they could not be lost, dropped, or fumbled.
The Apple Pencil shown today is a specialized ELECTRONIC tool which interacts with the iPad Pro and facilitates drawing specialized artwork lines with style and grace, something a dead stick stylus cannot do. For instance, the Apple Pencil makes doing Calligraphy easy, because controlling the flow and width of the line is dead easy with the Apple Pencil, where it is not with ta stylus that can only turn on pixels it actually touches.
This entire picture was drawn using the Apple Pencil.
Each line is a single stroke, drawn by changing angle and pressure.
None of this can be done by using a mere stylus.