Here's a question for you - what is your criteria for powerful enough? What is it you want to make?
Right now we are working on 2D single player RPG, based on platformer-like scrolling style.
Game centered on quests with (we hope) a lot of humor storyline (we already have all text in out C# text based version of this game) and turn based battle system close but not equal to FinalFantasy/Heroes1-2-3.
Main character has up to 3 follofers with personal inventory/stats.
This is not commercial project, but we want to make it polished and run without lags on desktops/netbooks.
If all this can run stable with 50-60 FPS at 1024*768 resolution - it will be perfect, because SC-2 can help to develop this project really rapid, versus coding in C#. The difference will be in many months of human-hours. In same time I don't need .EXE as requirement. If SC-2 will allow to us receive same results with WebGL in HTML-5 - it will be great. I write about Exe/DirectX exporter because it's standart of performance.
One more point why I have doubts:
please look on "Trashoid Attack" (http://www.scirra.com/arcade/addicting-action-games/76/trashoid-attack) - brilliant game, imho, but it have max 37-42 FPS even in webgl mode in Chrome.
You could simply make a quick graphical prototype to test it - simply throw in the assets of the most intensive scene your game will have and a text object showing the fps to see how it runs.
Yes, I will definitely do it. But this topic was an attempt to listen developers who are already have their own personal experience with complex projects on SC-2.
Thank to all who help me with this question, especially to Arima. <img src="smileys/smiley9.gif" border="0" align="middle">
p.s. If someone can add any info on this topic, please do it.