JarlFrank
I like Thief THIS much
All of the above. Like I said, in 20 years you continue to click away. I'll be a ninja with exaggerated physical ability, a superhero, an evil overlord, or whatever.
I can already be all of the above because I do not require hyperrealistic simulation in order to be immersed. Isometric, first person, or even a simple text adventure or a pen and paper/tabletop session, I can be immersed in any case, it's called suspension of disbelief and it works quite well if you have such a thing called imagination. In fact, I've never been as immersed as in good pen and paper groups with a very reactive DM who gave lots of freedom to the players. You really could play that character you designed in the way you want to without restrictions, and the game world (simulated by the DM) would react to it.
And reactivity and believability are the only things I need for my immersion. I am not just "clicking things", I actually am that evil overlord/righteous hero/whateverthefuck character as long as the game gives me the possibility to play out that role and reacts to it accordingly. Clicking things is just how I interface with that world, like touching things and opening my mouth to speak is merely the interface of how I interact with our real world. If there was a keyboard and a mouse inside my brain that I mentally click in order to do things, it wouldn't change anything at all except for the interface I use to interact with our world.