In my recollection, until the late 1990s, all four outer planets, including Uranus and Neptune, were generally referred to (in lay media) as gas giants. They all have very deep atmospheres and may be wholly fluid, although pressures and temperatures are so high in the interior that scientists cannot be sure if the matter is crystalline and solid because the pressure is so high, or fluid because the temperature is so high. But none of them are known to have solid surfaces.
But Jupiter and Saturn are mostly hydrogen (with some helium), while Uranus and Neptune are mostly methane, ammonia, and water (with some hydrogen and helium). Astronomers call all of those substances "ices" when talking about the outer solar system, because that's the form they would normally take at those temperatures. So Uranus and Neptune are now called ice giants and the Wikipedia article says, for instance, that Uranus is mostly ice. But that does not mean that it is mostly frozen solid, just that it's mostly materials that would be liquid or gaseous on earth and would be frozen solid on a moon at that distance.
So, all of the above was just background. If you moved Uranus to Earth's orbit, it would be very similar to the way it is now, just much warmer at the cloud tops.
Note that Oscar Lanczi's answer is much more detailed, and based on stronger knowledge, but I thought this would provide helpful background.