It typically takes a long time to change an entire government without first destroying it so a new one can be rebuilt, but that being said:
1) Obama supports continuing Bush's illegal wiretapping policies
2) Obama has stated that he will not push to legalize marijuana during his presidency
3) Obama has not merely continued Bush's unchecked deficet spending, but has dramatically increased it
4) Is still keeping our soldiers in the middle east and not bringing them home(shifting them from an oil war in Iraq to a land grab in Afghanistan is not really changing anything)
5) Obama supports continuing unchecked corporate welfare as Bush has(handouts to banks, to car companies, TARP, ect)
6) A pawn of the banking companies, big agribusiness, media conglomerates looking at where he got his funding(as Bush was)
That said, to his credit he:
1) Has made an attempt to free detainees from Guantanamo who are illegally being held
2) Supported a middle class and working class tax cut(albeit a miniscule one)
3) Has a degree of support for renewable energy(Bush had virtually none)
4) He actually reads the news(unlike Bush)
Is he really any kind of change, when Americans are wanting an end to illegal monitoring of their records and conversations, an end to the wars, an end to wealth leaving their pocketbooks and concentrating into fewer hands, and want some real transparency in their government? I don't think so. Instead of getting an outright fascist(Bush), we get an a mildly authoritarian welfare capitalist(Obama). Close enough; we still keep big government and corporate control of big government after all...