Okay, let's take it one step further. For how many of those games is it the case that the Steam activation requirement was forced onto the developer as a necessity to sell and distribute the game under any circumstance as opposed to a choice by the developer to integrate the conveniences that Steam provides into the game or also provide distribution of the game through Steam, in both which cases, Steam activation is a necessity for use of the services Steam provides? Which of those games require Steam activation, yet, they are not also distributed through Steam and do not use any Steam services? How is it that Steam has compelled these games to require Steam activation through mere fact of the existence of Steam as opposed to the game developers wanting to make use of the Steam services from within the game?
The point I'm trying to convey is that the Steam activation is the result of a choice by the developer, not a compulsion from Steam itself. Any of those developers could easily have made their game such to not integrate with any features of Steam, in which case the activation would not be required. In fact, there are a number of games that can be registered into Steam for purposes of using Steam as a game library manager, but can be played just fine without activation through Steam. However, you won't necessarily get any of the conveniences in the game that Steam provides to games that are more integrated with it. If the game makes use of Steam services, then it is only natural that it require Steam activation to access those services. That is not a compulsion; that is a design choice.
We've been using Steam as an example, but we could just as easily have used Origin, GoG, or any number of other digital distribution channels. In all those cases, distribution through any given channel is not a compulsion, it is a choice by the developer. So, no, I do not agree that we have a forced situation as yet. Until I see an EXPLICIT statement from Microsoft saying that ANY AND ALL software CANNOT be purchased and installed on Windows 8 EXCEPT via the Windows Store coupled with STRICT ENFORCEMENT of that policy, it is difficult for me to believe that Windows 8 and the Windows Store spells the doom of all other channels for game distribution and, hence, the end of Windows gaming. It is the presentation of that explicit statement backed by strict enforcement that your arguments have failed to materialize. So, I remain skeptical that Windows 8 truly represents the threat some people are claiming. I especially continue to remain skeptical of those with vested interests.