Of all the new projection tv technologies out there LCoS is the only one that has the ability to become much cheaper once the technology catches on & it can produce more resolution at less cost. Because of these reasons it gets my vote on which of these technologies will last. On the other hand no one has been able to "get it right" yet. All 3 technologies are very similar as for as outcome is concerned, all are good, some stronger in some areas, weaker in others, in the relatively near future at least one of these technologies won't make it, if philips, sony or someone comes out with a reliable LCoS tv, that's where i'll be resting my bets at, otherwise it may be a longer battle than I think.
The 3-chip DLPs (without the wheel) have my vote. See www.barco.com.