Well I see I'm alittle late to the posting party, but I'll give my thoughts anyway. At first I was stunned to see that Sony blatantly tried to copy most of Wii's functions, but after thinking about it, I find it quite laughable. For once I may be rooting for both Nintendo and Microsoft to overtake Sony, nothing irks me more than blatant ripoffs with no innovation.
Really, in a way I think this could really help Nintendo, not only is PS3 priced like gold, but I think many will find this attempt to be laughable, along with focusing more on Nintendo since it shows that there is something to Nintendo's Wii. I also believe this does show why Nintendo does fear revealing too much, this is the 2nd time they've been copied from an early revealing (the first being the digital stick). Luckily Sony didn't have much time to make good use of it, and it may have turned into a disaster! Now is the time, if any, for Nintendo to have a stellar E3 presentation, if they can do that I think that momentum will drive them to a very sucessful generation of gaming.
P.S. Why didn't Sony keep the boomerang remote? It would have made a great boomerang throwing simulation with their "innovative" motion sensor.