Absolutely (USA). But, first we need to get all the politicians to get their sticky fingers off the HSR systems and let people who know what they're doing design the things. In the US, HSR would work wonders as an interregional long-distance system, essentially an upgrade and expansion of the major Amtrak corridors. But the only way to pull it off with the success of Asia and Europe would require it to be handled on a federal level, and the US simply doesn't have a powerful enough national government to make that happen. Local politics have too much influence on matters of national planning. And funding is also a huge problem here. Ideally we should tunnel it though any urban areas where it can't be added to an existing major corridor (ie 6+ tracks 24/7 service already there), but there's no way that could be done unless the federal gov't simply ate the cost, but Congress would never pass that budget. So while I'd love to see it happen, it's just not particularly realistic at the moment.
Also, I should point out that HSR is not a commuter service. One stop per metro, period. If you want to commute you should use the local system. Some metros may warrant multiple stops due to geographic coverage (LA), tremendous usage (NYC), or multiple cores (SF Bay). But remember HSR has to move slower through urban areas, and you may travel just as fast on an express metro as you would on HSR through areas where commuting was possible.
And as for HSR worldwide, most of the world cannot afford it, nor do they have the demand that would pay for the service if it did exist, and crime and immigration and technological differences would fragment any such system at this time. But, for the distant future it's something to aspire to.