I think that some people will begin to realize Google has to much control. Frankly, I am interested to see how the browser wars go. IE 8 beta 2 is going to give chrome a run for their money. MSN and Yahoo are also offering more webmaster tools as well. I think eventually things will shift more to an equal division. There was a time, if some can recall, when Yahoo was the king. Things can change quickly....
"Microsoft offers to buy Yahoo! for £22.4bn" was the buzz earlier this year, I wonder how google would of responded if this deal actually went ahead?
most certainly, google is facing challenges and will face over the next few years....especially from new-comers in this field...apart from that yahoo has improved alot.