i would have thought it depends on the range and if they do an automatic boot option.
also what exactly do you mean push a button on the key fob to unlock but you still have to lift or do you mean a boot that opens fully automatically. if the latter i would have thought not as the opening/closing mechanism would be considerbly different to an ordinary boot.
there are i think instances where the top of the range models have auto boots but it is not enabled on cheaper versions and there are after market fixes to enable the function. but thats only because the same mechanism is fitted to all but not enabled in the computer/wiring etc.