Update: Sony has confirmed that the bundle is legitmate in a statement to Eurogamer commenting:
"The availability of the PS4 / PS Vita bundle will be determined and announced on a regional basis."
Original Story: Amazon France is currently selling a PlayStation 4 and PlayStation Vita 'Ultimate Player Edition' bundle with the two system bundle costing €579.99.
A PS4 is €400 while a Vita is €190 meaning the deal saves you all of €10. Sony UK did sell PS4 and Vitas together when the former system launched last year but that was a 'soft bundle' meaning it wasn't part of a boxed package.
It's possible Sony are planning to officially announce the bundle at E3 next week and they've certainly encouraged players to buy both in the past calling the Vita PS4's "perfect partner."
PS4 games can be played on Vita thanks to Remote Play and PS Now, Sony's Netflix-like game streaming service, will be compatible with both.
If Sony does issue a statement on this or if there's an official announcement next week we'll let you know.
