From just simple hologram images to interactive ones based on the deceased personality. For example, you could interact with people you knew in game that had recently died. They wouldn't be as complex as any found in the Relic 2.0 of course, but I wouldn't put it past a greedy corp exploiting the grief of the departed's friends and family.
Even the Relic 1.0, it's the richest people among the richest who can afford it... I'm not sure that those "people" would really like to rest in peace nearby a turtle (or even a doll, a merc or anyone here)
As Viktor says "V is the less fortunate of the Relic users, literally and figuratively"
Besides, Relic 1.0 is the only one available for "those who have enormous financial means". The Relic 2.0 is a special order, unique, fully supervised and intended for Saburo's usage only (or his close family, except Yorinobu probably...) As Saburo says in the datapad in his AV, he'd rather turn Night City to ashes than drop it between the hands of these "barbarians"