There is nothing so thrilling as boarding an aeroplane to journey to an exciting new holiday destination. Until, that is, you remember the flight is at least twelve hours long. As comfortable as business and first class seats are, nothing can compare to the splendour of sleeping in a hotel suite on plush pillows, wrapped in high-thread sheets. That begs the question, can you have your cake and eat it too? Well, Emirates, Singapore Airlines and Etihad seem to think so with their ultra luxe airline suites.