Well, personally I think the Wii had a very positive effect on the gaming industry. If Microsoft had bought the license for the tech that became the Wii's motion control system, there's a good chance they would have just sat on it and waiting until 'the time was right'. Nintendo were the ideal company for this to end up with really, as they've always been quite happy to take risks.
As it happens, their risk mostly paid off, and essentially forced MS and Sony to seriously consider alternative control schemes. Now, even the most hardened Kinect or PS Move hater would be being rather disingenuous if they were to claim that motion control doesn't have the potential to change the way we play games in a positive way. Sure, for every Skyward Sword, the Wii had about a hundred 'waggle the stick on cue' titles, but when a developer got those controls right, it really did improve the experience.
Now, Kinect hasn't quite managed that yet (as much as I loved Rise Of Nightmares, I concede that it would have been much less 'idiosyncratic' if it had used a Wii-nunchuck style controller for movement and a button for picking up items. Whether to use buttons or gestures for opening doors is a matter of personal preference really), and PS Move has been hampered by relatively low uptake that has sadly kept a lot of developers from taking the risk of implementing it in any significant way. Despite these shaky implementations and logistical stumbling blocks, there is still a lot of potential in motion control, it's just up to developers to make use of it, and hardware manufacturers to provide an environment where it's safe for the devs to take those risks (ie, don't make your motion control solution ridiculously expensive or require the purchase of several different pieces).