You will not be able to fly an EASA aircraft with an NPPL.
That is true but does not necessarily lead to an assumption that the NPPL will survive. There is no reason why individual states could not allow Annex II aircraft to be flown on a relevant EASA licence. As to the lifetime PPL, Whopity's idea aside, on the adoption of the EASA implementing rules, the UK lifetime PPL will become worthless. EASA will recognise only those existing licences that were issued in accordance with JAR-FCL. You will need to obtain a JAA PPL prior to 2012.