Your game collection must be seriously woeful. Have you ever played ANY breakout game other than the original Pong ? Have you played ANY top down space game other than "Space War" ? Did you have as much fervour when Megaball was released on the Amiga ? I mean thats just breakout with powerups. I bet you have played games like these and i bet you've paid for games like these too. Same game, different gfx.
I can totally understand what you are saying, i just don't understand WHY you are saying it. Game design ripoff, idea ripoff and direct cloning for profit has been going on since the dawn of computers. Its no different now.