Dirk Grappendorf created a laptop based on a MOS 6502 processor. The features are: 6502 processor, 6522 VIA’s, SID, 32 kByte RAM, 32 kByte EEPROM, battery, 4 line / 40 character LCD screen, modified USB keyboard, BASIC interpreter and a 3D printed case.
Website: http://www.grappendorf.net