Look at these specs from the Windows Media HD page to be able to play 720p on a pc then compare to the N900 and i am sure you will have the answers. Minimum Configuration (to play 720p video) Windows XP Windows Media Player 9 Series 2.4 GHz processor or equivalent 384 MB of RAM 64 MB video card DVD drive 1024 x 768 screen resolution 16-bit sound card Speakers Optimum Configuration (to play 1080p video with 5.1 surround sound) Windows XP Windows Media Player 9 Series DirectX 9.0 3.0 GHz processor or equivalent 512 MB of RAM 128 MB video card DVD drive 1920 x 1440 screen resolution 24-bit 96 kHz multichannel sound card 5.1 surround sound speaker system. Good luck is all i can say