I hate to be pessimistic here but it's interesting to see many people declaring the new features for Leopard and that it's going to be great whereas in reality almost nothing is known about this release. Given this I'm withholding all judgement on this release until after the demonstrations and a feature list so that I can evaluate how this is going to help me get my work done.
On a side note, Tiger delivered a reasonable amount of new and useful features but came at the price (for me) of a slower system and more frequent screw-ups. I'm going to be buying a MacBook Pro later this year and therefore my wife will inherit my PowerBook that I will rebuild for her. As part of this rebuild I may put Panther back on again rather than Tiger since she's unlikely to have much need for the new features in Tiger and she may appreciate more the speed and reliability it delivered.
On a side note, Tiger delivered a reasonable amount of new and useful features but came at the price (for me) of a slower system and more frequent screw-ups. I'm going to be buying a MacBook Pro later this year and therefore my wife will inherit my PowerBook that I will rebuild for her. As part of this rebuild I may put Panther back on again rather than Tiger since she's unlikely to have much need for the new features in Tiger and she may appreciate more the speed and reliability it delivered.