Hewlett-Packard’s first webOS-powered tablet will launch this April, a new report claims. Industry watcher DigiTimes cites sources from within HP’s component suppliers in stating that manufacturers will begin shipping the TouchPad by the end of March. The TouchPad, which will launch with webOS 3.0, will then be ready for release some time in April. The report goes on to estimate that HP intends to sell between 4 and 5 million TouchPad units and between 45 and 48 million notebook computers and tablet PCs combined in 2011. HP has not provided any specific information in terms of a launch date or pricing for the TouchPad, which we got up close and personal with earlier this month.