Agreed.
Even under the corrupt reading of the Constitution provided by the Kelo decision, the notion that there is a 'public purpose' to letting one developer rather than another provide the same increase in tax revenues is absurd.
Giving the SCOTUS the chance to revisit Kelo in an issue where the use of eminent domain is completely indefensible seems like a very good idea.
The real problem is stare decisis - "it is decided", the judicial concept of respect for precedent.
The Kelo decision did not orginate from a vacumn. The unanimous, SCOTUS 1954 Berman v Parker decision opened up the "use" language of eminent domain to "purpose", for the expressed purpose of a Washington D.C. urban renewal project in a depressed slum area. Although that decision specified a restriction to urban renewal in a depressed area, the concept that SCOTUS could arbitrarily modify the term "use", on its own had been given a precedent on which the later Kelo decision was built.
In Kelo, "use" having arrived as already modified as "purpose" was further modified to "benefit", with benefit no more than a public proclamation of the politicians who chose to apply eminent domain to their politically determined purpose.
Liberals call this process the "living constitution" when in fact it is nothing other than the slow, deliberate process by which our Constitution, the Constitution of "we the people", is slowly eroded without our consent, without recourse and replaced with a Constiution dicated by SCOTUS.
It is for this reason that SCOTUS decisions and SCOTUS appointments have become so political, because the locus of our "constitutional rights" has been moved from the public, electoral, political process of amending the Constitution to a dictatorial power in SCOTUS.
Liberals neither trust nor accept the political process to advance their goals. In fact, the law-making history of liberals since the New Deal has been to keep moving policy decisions out of the democratically elected bodies and institutionalize liberal rule-making mandates into unelected regulatory bodies - courts and appointed regulatory agencies.