Custom conditional operator in Scala with widening support

CustomCondOp.scala

import util.Random
import scalaz._
import Scalaz._
import CustomCondOp._

trait Card {
  println(s"Constructing ${getClass.getSimpleName}")
}

class BigCard extends Card

class SmallCard extends Card

object Main extends App {
  def printCard(card: Card) {println(card.getClass.getSimpleName)}

  // Code bellow works fine, but I would prefer less verbose conditional operator (like ?: from JavaScript).
  (if (Random.nextBoolean) new BigCard else new SmallCard) |> printCard

  // I thought ScalaZ's ?| was meant to be an alternative to if. But following statement fails to compile. 
  //(Random.nextBoolean ? new BigCard | new SmallCard) |> printCard

  // Here is a custom replacement ?|| with automatic widening. Can widen too much though.
  (Random.nextBoolean ?| new BigCard | new SmallCard) |> printCard
}

// based on answer from Alexey Romanov on SO

object CustomCondOp {

  class Cond[A](x: Boolean, value: => A) {
    def |[B >: A](other: => B) = if (x) value else other
  }

  implicit class CondOp(x: Boolean) {
    def ?|[A](y: => A) = new Cond(x, y)
  }

}